LCOV - code coverage report
Current view: top level - src/start - input_cp2k_motion.F (source / functions) Coverage Total Hit
Test: CP2K Regtests (git:8ebf9ad) Lines: 100.0 % 1135 1135
Test Date: 2026-01-22 06:43:13 Functions: 100.0 % 21 21

            Line data    Source code
       1              : !--------------------------------------------------------------------------------------------------!
       2              : !   CP2K: A general program to perform molecular dynamics simulations                              !
       3              : !   Copyright 2000-2026 CP2K developers group <https://cp2k.org>                                   !
       4              : !                                                                                                  !
       5              : !   SPDX-License-Identifier: GPL-2.0-or-later                                                      !
       6              : !--------------------------------------------------------------------------------------------------!
       7              : 
       8              : ! **************************************************************************************************
       9              : !> \par History
      10              : !>      10.2005 split input_cp2k into smaller modules [fawzi]
      11              : !>      01.2020 add keywords related to Space Groups [pcazade]
      12              : !> \author teo & fawzi
      13              : ! **************************************************************************************************
      14              : MODULE input_cp2k_motion
      15              :    USE bibliography, ONLY: Brieuc2016, &
      16              :                            Byrd1995, &
      17              :                            Ceriotti2010, &
      18              :                            Ceriotti2012, &
      19              :                            Ceriotti2014, &
      20              :                            Henkelman1999, &
      21              :                            Henkelman2014, &
      22              :                            Kapil2016
      23              :    USE cp_output_handling, ONLY: add_last_numeric, &
      24              :                                  cp_print_key_section_create, &
      25              :                                  debug_print_level, &
      26              :                                  high_print_level, &
      27              :                                  low_print_level, &
      28              :                                  medium_print_level
      29              :    USE cp_units, ONLY: cp_unit_to_cp2k
      30              :    USE input_constants, ONLY: &
      31              :       default_bfgs_method_id, default_cell_direct_id, default_cell_geo_opt_id, &
      32              :       default_cell_md_id, default_cg_method_id, default_dimer_method_id, &
      33              :       default_lbfgs_method_id, default_minimization_method_id, default_ts_method_id, &
      34              :       do_mc_gemc_npt, do_mc_gemc_nvt, do_mc_traditional, do_mc_virial, fix_none, fix_x, fix_xy, &
      35              :       fix_xz, fix_y, fix_yz, fix_z, fmt_id_pdb, fmt_id_xyz, gaussian, helium_cell_shape_cube, &
      36              :       helium_cell_shape_octahedron, helium_forces_average, helium_forces_last, &
      37              :       helium_mdist_exponential, helium_mdist_gaussian, helium_mdist_linear, &
      38              :       helium_mdist_quadratic, helium_mdist_singlev, helium_mdist_uniform, &
      39              :       helium_sampling_ceperley, helium_sampling_worm, helium_solute_intpot_mwater, helium_solute_intpot_nnp, &
      40              :       helium_solute_intpot_none, integrate_exact, integrate_numeric, ls_2pnt, ls_3pnt, ls_fit, &
      41              :       ls_gold, ls_none, matrix_init_cholesky, matrix_init_diagonal, numerical, perm_cycle, &
      42              :       perm_plain, propagator_pimd, propagator_rpmd, propagator_cmd, transformation_normal, transformation_stage
      43              :    USE input_cp2k_constraints, ONLY: create_constraint_section
      44              :    USE input_cp2k_free_energy, ONLY: create_fe_section
      45              :    USE input_cp2k_md, ONLY: create_md_section
      46              :    USE input_cp2k_motion_print, ONLY: add_format_keyword, &
      47              :                                       create_motion_print_section
      48              :    USE input_cp2k_neb, ONLY: create_band_section
      49              :    USE input_cp2k_subsys, ONLY: create_rng_section
      50              :    USE input_cp2k_thermostats, ONLY: create_coord_section, &
      51              :                                      create_gle_section, &
      52              :                                      create_velocity_section
      53              :    USE input_cp2k_tmc, ONLY: create_TMC_section
      54              :    USE input_keyword_types, ONLY: keyword_create, &
      55              :                                   keyword_release, &
      56              :                                   keyword_type
      57              :    USE input_section_types, ONLY: section_add_keyword, &
      58              :                                   section_add_subsection, &
      59              :                                   section_create, &
      60              :                                   section_release, &
      61              :                                   section_type
      62              :    USE input_val_types, ONLY: integer_t, &
      63              :                               logical_t, &
      64              :                               real_t, &
      65              :                               char_t
      66              :    USE kinds, ONLY: dp
      67              :    USE string_utilities, ONLY: s2a
      68              : #include "../base/base_uses.f90"
      69              : 
      70              :    IMPLICIT NONE
      71              :    PRIVATE
      72              : 
      73              :    LOGICAL, PRIVATE, PARAMETER :: debug_this_module = .TRUE.
      74              :    CHARACTER(len=*), PARAMETER, PRIVATE :: moduleN = 'input_cp2k_motion'
      75              : 
      76              :    PUBLIC :: create_motion_section
      77              : 
      78              : CONTAINS
      79              : 
      80              : ! **************************************************************************************************
      81              : !> \brief creates the motion section
      82              : !> \param section the section to be created
      83              : !> \author teo
      84              : ! **************************************************************************************************
      85         9350 :    SUBROUTINE create_motion_section(section)
      86              :       TYPE(section_type), POINTER                        :: section
      87              : 
      88              :       TYPE(section_type), POINTER                        :: subsection
      89              : 
      90         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
      91              :       CALL section_create(section, __LOCATION__, name="motion", &
      92              :                           description="This section defines a set of tool connected with the motion of the nuclei.", &
      93         9350 :                           n_keywords=1, n_subsections=1, repeats=.FALSE.)
      94              : 
      95         9350 :       NULLIFY (subsection)
      96              : 
      97              :       CALL create_geoopt_section(subsection, __LOCATION__, label="GEO_OPT", &
      98              :                                  description="This section sets the environment of the geometry optimizer.", &
      99              :                                  just_optimizers=.FALSE., &
     100         9350 :                                  use_model_hessian=.TRUE.)
     101         9350 :       CALL section_add_subsection(section, subsection)
     102         9350 :       CALL section_release(subsection)
     103              : 
     104         9350 :       CALL create_cell_opt_section(subsection)
     105         9350 :       CALL section_add_subsection(section, subsection)
     106         9350 :       CALL section_release(subsection)
     107              : 
     108         9350 :       CALL create_shellcore_opt_section(subsection)
     109         9350 :       CALL section_add_subsection(section, subsection)
     110         9350 :       CALL section_release(subsection)
     111              : 
     112         9350 :       CALL create_md_section(subsection)
     113         9350 :       CALL section_add_subsection(section, subsection)
     114         9350 :       CALL section_release(subsection)
     115              : 
     116         9350 :       CALL create_driver_section(subsection)
     117         9350 :       CALL section_add_subsection(section, subsection)
     118         9350 :       CALL section_release(subsection)
     119              : 
     120         9350 :       CALL create_fe_section(subsection)
     121         9350 :       CALL section_add_subsection(section, subsection)
     122         9350 :       CALL section_release(subsection)
     123              : 
     124         9350 :       CALL create_constraint_section(subsection)
     125         9350 :       CALL section_add_subsection(section, subsection)
     126         9350 :       CALL section_release(subsection)
     127              : 
     128         9350 :       CALL create_fp_section(subsection)
     129         9350 :       CALL section_add_subsection(section, subsection)
     130         9350 :       CALL section_release(subsection)
     131              : 
     132         9350 :       CALL create_mc_section(subsection)
     133         9350 :       CALL section_add_subsection(section, subsection)
     134         9350 :       CALL section_release(subsection)
     135              : 
     136         9350 :       CALL create_TMC_section(subsection)
     137         9350 :       CALL section_add_subsection(section, subsection)
     138         9350 :       CALL section_release(subsection)
     139              : 
     140         9350 :       CALL create_pint_section(subsection)
     141         9350 :       CALL section_add_subsection(section, subsection)
     142         9350 :       CALL section_release(subsection)
     143              : 
     144         9350 :       CALL create_band_section(subsection)
     145         9350 :       CALL section_add_subsection(section, subsection)
     146         9350 :       CALL section_release(subsection)
     147              : 
     148         9350 :       CALL create_motion_print_section(subsection)
     149         9350 :       CALL section_add_subsection(section, subsection)
     150         9350 :       CALL section_release(subsection)
     151              : 
     152         9350 :    END SUBROUTINE create_motion_section
     153              : 
     154              : ! **************************************************************************************************
     155              : !> \brief creates the Monte Carlo section
     156              : !> \param section the section to be created
     157              : !> \author matt
     158              : ! **************************************************************************************************
     159         9350 :    SUBROUTINE create_mc_section(section)
     160              :       TYPE(section_type), POINTER                        :: section
     161              : 
     162              :       TYPE(keyword_type), POINTER                        :: keyword
     163              :       TYPE(section_type), POINTER                        :: subsection
     164              : 
     165         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     166              :       CALL section_create(section, __LOCATION__, name="mc", &
     167              :                           description="This section sets parameters to set up a MonteCarlo calculation.", &
     168         9350 :                           n_keywords=10, n_subsections=2, repeats=.FALSE.)
     169              : 
     170         9350 :       NULLIFY (keyword, subsection)
     171              : 
     172              :       CALL keyword_create(keyword, __LOCATION__, name="NSTEP", &
     173              :                           description="Specifies the number of MC cycles.", &
     174              :                           usage="NSTEP {integer}", &
     175         9350 :                           default_i_val=100)
     176         9350 :       CALL section_add_keyword(section, keyword)
     177         9350 :       CALL keyword_release(keyword)
     178              : 
     179              :       CALL keyword_create(keyword, __LOCATION__, name="IPRINT", &
     180              :                           description="Prints coordinate/cell/etc information every IPRINT steps.", &
     181              :                           usage="IPRINT {integer}", &
     182         9350 :                           default_i_val=1)
     183         9350 :       CALL section_add_keyword(section, keyword)
     184         9350 :       CALL keyword_release(keyword)
     185              : 
     186              :       CALL keyword_create(keyword, __LOCATION__, name="NMOVES", &
     187              :                           description="Specifies the number of classical moves between energy evaluations. ", &
     188              :                           usage="NMOVES {integer}", &
     189         9350 :                           default_i_val=4)
     190         9350 :       CALL section_add_keyword(section, keyword)
     191         9350 :       CALL keyword_release(keyword)
     192              : 
     193              :       CALL keyword_create(keyword, __LOCATION__, name="NSWAPMOVES", &
     194              :                           description="How many insertions to try per swap move.", &
     195              :                           usage="NSWAPMOVES {integer}", &
     196         9350 :                           default_i_val=16)
     197         9350 :       CALL section_add_keyword(section, keyword)
     198         9350 :       CALL keyword_release(keyword)
     199              : 
     200              :       CALL keyword_create(keyword, __LOCATION__, name="LBIAS", &
     201              :                           description="Dictates if we presample moves with a different potential.", &
     202              :                           usage="LBIAS {logical}", &
     203         9350 :                           default_l_val=.FALSE.)
     204         9350 :       CALL section_add_keyword(section, keyword)
     205         9350 :       CALL keyword_release(keyword)
     206              : 
     207              :       CALL keyword_create(keyword, __LOCATION__, name="LSTOP", &
     208              :                           description="Makes nstep in terms of steps, instead of cycles.", &
     209              :                           usage="LSTOP {logical}", &
     210         9350 :                           default_l_val=.FALSE.)
     211         9350 :       CALL section_add_keyword(section, keyword)
     212         9350 :       CALL keyword_release(keyword)
     213              : 
     214              :       CALL keyword_create(keyword, __LOCATION__, name="LDISCRETE", &
     215              :                           description="Changes the volume of the box in discrete steps, one side at a time.", &
     216              :                           usage="LDISCRETE {logical}", &
     217         9350 :                           default_l_val=.FALSE.)
     218         9350 :       CALL section_add_keyword(section, keyword)
     219         9350 :       CALL keyword_release(keyword)
     220              : 
     221              :       CALL keyword_create(keyword, __LOCATION__, name="RCLUS", &
     222              :                           description="The cluster cut off radius in angstroms.", &
     223              :                           usage="RCLUS {real}", &
     224         9350 :                           default_r_val=1.0E0_dp)
     225         9350 :       CALL section_add_keyword(section, keyword)
     226         9350 :       CALL keyword_release(keyword)
     227              : 
     228              :       CALL keyword_create(keyword, __LOCATION__, name="RESTART", &
     229              :                           description="Read initial configuration from restart file.", &
     230              :                           usage="RESTART {logical}", &
     231         9350 :                           default_l_val=.FALSE.)
     232         9350 :       CALL section_add_keyword(section, keyword)
     233         9350 :       CALL keyword_release(keyword)
     234              : 
     235              :       CALL keyword_create( &
     236              :          keyword, __LOCATION__, name="NVIRIAL", &
     237              :          description="Use this many random orientations to compute the second virial coefficient (ENSEMBLE=VIRIAL)", &
     238              :          usage="NVIRIAL {integer}", &
     239         9350 :          default_i_val=1000)
     240         9350 :       CALL section_add_keyword(section, keyword)
     241         9350 :       CALL keyword_release(keyword)
     242              : 
     243              :       CALL keyword_create(keyword, __LOCATION__, name="ENSEMBLE", &
     244              :                           description="Specify the type of simulation", &
     245              :                           usage="ENSEMBLE (TRADITIONAL|GEMC_NVT|GEMC_NPT|VIRIAL)", &
     246              :                           enum_c_vals=s2a("TRADITIONAL", "GEMC_NVT", "GEMC_NPT", "VIRIAL"), &
     247              :                           enum_i_vals=[do_mc_traditional, do_mc_gemc_nvt, do_mc_gemc_npt, do_mc_virial], &
     248         9350 :                           default_i_val=do_mc_traditional)
     249         9350 :       CALL section_add_keyword(section, keyword)
     250         9350 :       CALL keyword_release(keyword)
     251              : 
     252              :       CALL keyword_create(keyword, __LOCATION__, name="RESTART_FILE_NAME", &
     253              :                           description="Name of the restart file for MC information.", &
     254              :                           usage="RESTART_FILE_NAME {filename}", &
     255         9350 :                           default_lc_val="")
     256         9350 :       CALL section_add_keyword(section, keyword)
     257         9350 :       CALL keyword_release(keyword)
     258              : 
     259              :       CALL keyword_create(keyword, __LOCATION__, name="MOVES_FILE_NAME", &
     260              :                           description="The file to print the move statistics to.", &
     261              :                           usage="MOVES_FILE_NAME {filename}", &
     262         9350 :                           default_lc_val="")
     263         9350 :       CALL section_add_keyword(section, keyword)
     264         9350 :       CALL keyword_release(keyword)
     265              : 
     266              :       CALL keyword_create(keyword, __LOCATION__, name="MOLECULES_FILE_NAME", &
     267              :                           description="The file to print the number of molecules to.", &
     268              :                           usage="MOLECULES_FILE_NAME {filename}", &
     269         9350 :                           default_lc_val="")
     270         9350 :       CALL section_add_keyword(section, keyword)
     271         9350 :       CALL keyword_release(keyword)
     272              : 
     273              :       CALL keyword_create(keyword, __LOCATION__, name="COORDINATE_FILE_NAME", &
     274              :                           description="The file to print the current coordinates to.", &
     275              :                           usage="COORDINATE_FILE_NAME {filename}", &
     276         9350 :                           default_lc_val="")
     277         9350 :       CALL section_add_keyword(section, keyword)
     278         9350 :       CALL keyword_release(keyword)
     279              : 
     280              :       CALL keyword_create(keyword, __LOCATION__, name="ENERGY_FILE_NAME", &
     281              :                           description="The file to print current energies to.", &
     282              :                           usage="ENERGY_FILE_NAME {filename}", &
     283         9350 :                           default_lc_val="")
     284         9350 :       CALL section_add_keyword(section, keyword)
     285         9350 :       CALL keyword_release(keyword)
     286              : 
     287              :       CALL keyword_create(keyword, __LOCATION__, name="DATA_FILE_NAME", &
     288              :                           description="The file to print current configurational info to.", &
     289              :                           usage="DATA_FILE_NAME {filename}", &
     290         9350 :                           default_lc_val="")
     291         9350 :       CALL section_add_keyword(section, keyword)
     292         9350 :       CALL keyword_release(keyword)
     293              : 
     294              :       CALL keyword_create(keyword, __LOCATION__, name="CELL_FILE_NAME", &
     295              :                           description="The file to print current cell length info to.", &
     296              :                           usage="CELL_FILE_NAME {filename}", &
     297         9350 :                           default_lc_val="")
     298         9350 :       CALL section_add_keyword(section, keyword)
     299         9350 :       CALL keyword_release(keyword)
     300              : 
     301              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_DISP_FILE_NAME", &
     302              :                           description="The file to print current maximum displacement info to.", &
     303              :                           usage="MAX_DISP_FILE_NAME {filename}", &
     304         9350 :                           default_lc_val="")
     305         9350 :       CALL section_add_keyword(section, keyword)
     306         9350 :       CALL keyword_release(keyword)
     307              : 
     308              :       CALL keyword_create(keyword, __LOCATION__, name="BOX2_FILE_NAME", &
     309              :                           description="For GEMC, the name of the input file for the other box.", &
     310              :                           usage="BOX2_FILE_NAME {filename}", &
     311         9350 :                           default_lc_val="")
     312         9350 :       CALL section_add_keyword(section, keyword)
     313         9350 :       CALL keyword_release(keyword)
     314              : 
     315              :       CALL keyword_create(keyword, __LOCATION__, name="PRESSURE", &
     316              :                           description="The pressure for NpT simulations, in bar.", &
     317              :                           usage="PRESSURE {real}", &
     318         9350 :                           type_of_var=real_t)
     319         9350 :       CALL section_add_keyword(section, keyword)
     320         9350 :       CALL keyword_release(keyword)
     321              : 
     322              :       CALL keyword_create(keyword, __LOCATION__, name="TEMPERATURE", &
     323              :                           description="The temperature of the simulation, in Kelvin.", &
     324              :                           usage="TEMPERATURE {real}", &
     325         9350 :                           type_of_var=real_t)
     326         9350 :       CALL section_add_keyword(section, keyword)
     327         9350 :       CALL keyword_release(keyword)
     328              : 
     329              :       CALL keyword_create( &
     330              :          keyword, __LOCATION__, name="VIRIAL_TEMPS", &
     331              :          description="The temperatures you wish to compute the virial coefficient for.  Only used if ensemble=VIRIAL.", &
     332              :          usage="VIRIAL_TEMPS {real} {real} ... ", &
     333         9350 :          n_var=-1, type_of_var=real_t)
     334         9350 :       CALL section_add_keyword(section, keyword)
     335         9350 :       CALL keyword_release(keyword)
     336              : 
     337              :       CALL keyword_create(keyword, __LOCATION__, name="DISCRETE_STEP", &
     338              :                           description="The size of the discrete volume move step, in angstroms.", &
     339              :                           usage="DISCRETE_STEP {real}", &
     340         9350 :                           default_r_val=1.0E0_dp)
     341         9350 :       CALL section_add_keyword(section, keyword)
     342         9350 :       CALL keyword_release(keyword)
     343              : 
     344              :       CALL keyword_create(keyword, __LOCATION__, name="ETA", &
     345              :                           description="The free energy bias (in Kelvin) for swapping a molecule of each type into this box.", &
     346              :                           usage="ETA {real} {real} ... ", &
     347         9350 :                           n_var=-1, type_of_var=real_t)
     348         9350 :       CALL section_add_keyword(section, keyword)
     349         9350 :       CALL keyword_release(keyword)
     350              : 
     351              :       CALL keyword_create(keyword, __LOCATION__, name="RANDOMTOSKIP", &
     352              :                           description="Number of random numbers from the acceptance/rejection stream to skip", &
     353              :                           usage="RANDOMTOSKIP {integer}", &
     354         9350 :                           default_i_val=0)
     355         9350 :       CALL section_add_keyword(section, keyword)
     356         9350 :       CALL keyword_release(keyword)
     357              : 
     358         9350 :       CALL create_avbmc_section(subsection)
     359         9350 :       CALL section_add_subsection(section, subsection)
     360         9350 :       CALL section_release(subsection)
     361              : 
     362         9350 :       CALL create_move_prob_section(subsection)
     363         9350 :       CALL section_add_subsection(section, subsection)
     364         9350 :       CALL section_release(subsection)
     365              : 
     366         9350 :       CALL create_update_section(subsection)
     367         9350 :       CALL section_add_subsection(section, subsection)
     368         9350 :       CALL section_release(subsection)
     369              : 
     370         9350 :       CALL create_max_disp_section(subsection)
     371         9350 :       CALL section_add_subsection(section, subsection)
     372         9350 :       CALL section_release(subsection)
     373              : 
     374         9350 :    END SUBROUTINE create_mc_section
     375              : 
     376              : ! **************************************************************************************************
     377              : !> \brief ...
     378              : !> \param section will contain the AVBMC parameters for MC
     379              : !> \author matt
     380              : ! **************************************************************************************************
     381         9350 :    SUBROUTINE create_avbmc_section(section)
     382              :       TYPE(section_type), POINTER                        :: section
     383              : 
     384              :       TYPE(keyword_type), POINTER                        :: keyword
     385              : 
     386         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     387              : 
     388              :       CALL section_create(section, __LOCATION__, name="avbmc", &
     389              :                           description="Parameters for Aggregation Volume Bias Monte Carlo (AVBMC) "// &
     390              :                           "which explores cluster formation and destruction. "// &
     391              :                           "Chen and Siepmann, J. Phys. Chem. B 105, 11275-11282 (2001).", &
     392         9350 :                           n_keywords=5, n_subsections=0, repeats=.FALSE.)
     393              : 
     394         9350 :       NULLIFY (keyword)
     395              : 
     396              :       CALL keyword_create( &
     397              :          keyword, __LOCATION__, name="PBIAS", &
     398              :          description="The probability of swapping to an inner region in an AVBMC swap move for each molecule type.", &
     399              :          usage="PBIAS {real} {real} ... ", &
     400         9350 :          n_var=-1, type_of_var=real_t)
     401         9350 :       CALL section_add_keyword(section, keyword)
     402         9350 :       CALL keyword_release(keyword)
     403              : 
     404              :       CALL keyword_create(keyword, __LOCATION__, name="AVBMC_ATOM", &
     405              :                           description="The target atom for an AVBMC swap move for each molecule type.", &
     406              :                           usage="AVBMC_ATOM {integer} {integer} ... ", &
     407         9350 :                           n_var=-1, type_of_var=integer_t)
     408         9350 :       CALL section_add_keyword(section, keyword)
     409         9350 :       CALL keyword_release(keyword)
     410              : 
     411              :       CALL keyword_create(keyword, __LOCATION__, name="AVBMC_RMIN", &
     412              :                           description="The inner radius for an AVBMC swap move, in angstroms for every molecule type.", &
     413              :                           usage="AVBMC_RMIN {real} {real} ... ", &
     414         9350 :                           n_var=-1, type_of_var=real_t)
     415         9350 :       CALL section_add_keyword(section, keyword)
     416         9350 :       CALL keyword_release(keyword)
     417              : 
     418              :       CALL keyword_create(keyword, __LOCATION__, name="AVBMC_RMAX", &
     419              :                           description="The outer radius for an AVBMC swap move, in angstroms, for every molecule type.", &
     420              :                           usage="AVBMC_RMAX {real} {real} ... ", &
     421         9350 :                           n_var=-1, type_of_var=real_t)
     422         9350 :       CALL section_add_keyword(section, keyword)
     423         9350 :       CALL keyword_release(keyword)
     424              : 
     425         9350 :    END SUBROUTINE create_avbmc_section
     426              : 
     427              : ! **************************************************************************************************
     428              : !> \brief ...
     429              : !> \param section will contain the probabilities for attempting each move
     430              : !>        type in Monte Carlo
     431              : !> \author matt
     432              : ! **************************************************************************************************
     433         9350 :    SUBROUTINE create_move_prob_section(section)
     434              :       TYPE(section_type), POINTER                        :: section
     435              : 
     436              :       TYPE(keyword_type), POINTER                        :: keyword
     437              :       TYPE(section_type), POINTER                        :: subsection
     438              : 
     439         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     440              : 
     441              :       CALL section_create(section, __LOCATION__, name="move_probabilities", &
     442              :                           description="Parameters for fraction of moves performed for each move type.", &
     443         9350 :                           n_keywords=5, n_subsections=2, repeats=.FALSE.)
     444              : 
     445         9350 :       NULLIFY (keyword, subsection)
     446              : 
     447              :       CALL keyword_create(keyword, __LOCATION__, name="PMHMC", &
     448              :                           description="The probability of attempting a hybrid MC move.", &
     449              :                           usage="PMHMC {real}", &
     450         9350 :                           type_of_var=real_t, default_r_val=0.0E0_dp)
     451         9350 :       CALL section_add_keyword(section, keyword)
     452         9350 :       CALL keyword_release(keyword)
     453              : 
     454              :       CALL keyword_create(keyword, __LOCATION__, name="PMTRANS", &
     455              :                           description="The probability of attempting a molecule translation.", &
     456              :                           usage="PMTRANS {real}", &
     457         9350 :                           type_of_var=real_t)
     458         9350 :       CALL section_add_keyword(section, keyword)
     459         9350 :       CALL keyword_release(keyword)
     460              : 
     461              :       CALL keyword_create(keyword, __LOCATION__, name="PMCLTRANS", &
     462              :                           description="The probability of attempting a cluster translation.", &
     463              :                           usage="PMCLTRANS {real}", &
     464         9350 :                           type_of_var=real_t, default_r_val=0.0E0_dp)
     465         9350 :       CALL section_add_keyword(section, keyword)
     466         9350 :       CALL keyword_release(keyword)
     467              : 
     468              :       CALL keyword_create(keyword, __LOCATION__, name="PMAVBMC", &
     469              :                           description="The probability of attempting an AVBMC swap move.", &
     470              :                           usage="PMAVBMC {real}", &
     471         9350 :                           default_r_val=0.0E0_dp)
     472         9350 :       CALL section_add_keyword(section, keyword)
     473         9350 :       CALL keyword_release(keyword)
     474              : 
     475              :       CALL keyword_create(keyword, __LOCATION__, name="PMTRAION", &
     476              :                           description="The probability of attempting a conformational change.", &
     477              :                           usage="PMTRAION {real}", &
     478         9350 :                           type_of_var=real_t)
     479         9350 :       CALL section_add_keyword(section, keyword)
     480         9350 :       CALL keyword_release(keyword)
     481              : 
     482              :       CALL keyword_create(keyword, __LOCATION__, name="PMSWAP", &
     483              :                           description="The probability of attempting a swap move.", &
     484              :                           usage="PMSWAP {real}", &
     485         9350 :                           type_of_var=real_t, default_r_val=0.0E0_dp)
     486         9350 :       CALL section_add_keyword(section, keyword)
     487         9350 :       CALL keyword_release(keyword)
     488              : 
     489              :       CALL keyword_create(keyword, __LOCATION__, name="PMVOLUME", &
     490              :                           description="The probability of attempting a volume move.", &
     491              :                           usage="PMVOLUME {real}", &
     492         9350 :                           type_of_var=real_t, default_r_val=0.0E0_dp)
     493         9350 :       CALL section_add_keyword(section, keyword)
     494         9350 :       CALL keyword_release(keyword)
     495              : 
     496         9350 :       CALL create_mol_prob_section(subsection)
     497         9350 :       CALL section_add_subsection(section, subsection)
     498         9350 :       CALL section_release(subsection)
     499              : 
     500         9350 :       CALL create_box_prob_section(subsection)
     501         9350 :       CALL section_add_subsection(section, subsection)
     502         9350 :       CALL section_release(subsection)
     503              : 
     504         9350 :    END SUBROUTINE create_move_prob_section
     505              : 
     506              : ! **************************************************************************************************
     507              : !> \brief ...
     508              : !> \param section will contain the probabilities for attempting various moves
     509              : !>        on the various molecule types present in the system
     510              : !> \author matt
     511              : ! **************************************************************************************************
     512         9350 :    SUBROUTINE create_mol_prob_section(section)
     513              :       TYPE(section_type), POINTER                        :: section
     514              : 
     515              :       TYPE(keyword_type), POINTER                        :: keyword
     516              : 
     517         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     518              : 
     519              :       CALL section_create(section, __LOCATION__, name="mol_probabilities", &
     520              :                           description="Probabilities of attempting various moves types on "// &
     521              :                           "the various molecular types present in the simulation.", &
     522         9350 :                           n_keywords=5, n_subsections=0, repeats=.FALSE.)
     523              : 
     524         9350 :       NULLIFY (keyword)
     525              : 
     526              :       CALL keyword_create(keyword, __LOCATION__, name="PMAVBMC_MOL", &
     527              :                           description="The probability of attempting an AVBMC swap move on each molecule type.", &
     528              :                           usage="PMAVBMC_MOL {real} {real} ... ", &
     529         9350 :                           n_var=-1, type_of_var=real_t)
     530         9350 :       CALL section_add_keyword(section, keyword)
     531         9350 :       CALL keyword_release(keyword)
     532              : 
     533              :       CALL keyword_create(keyword, __LOCATION__, name="PMSWAP_MOL", &
     534              :                           description="The probability of attempting a molecule swap of a given molecule type.", &
     535              :                           usage="PMSWAP_MOL {real} {real} ... ", &
     536         9350 :                           n_var=-1, type_of_var=real_t)
     537         9350 :       CALL section_add_keyword(section, keyword)
     538         9350 :       CALL keyword_release(keyword)
     539              : 
     540              :       CALL keyword_create(keyword, __LOCATION__, name="PMROT_MOL", &
     541              :                           description="The probability of attempting a molecule rotation of a given molecule type.", &
     542              :                           usage="PMROT_MOL {real} {real} ... ", &
     543         9350 :                           n_var=-1, type_of_var=real_t)
     544         9350 :       CALL section_add_keyword(section, keyword)
     545         9350 :       CALL keyword_release(keyword)
     546              : 
     547              :       CALL keyword_create(keyword, __LOCATION__, name="PMTRAION_MOL", &
     548              :                           description="The probability of attempting a conformational change of a given molecule type.", &
     549              :                           usage="PMTRAION_MOL {real} {real} ... ", &
     550         9350 :                           n_var=-1, type_of_var=real_t)
     551         9350 :       CALL section_add_keyword(section, keyword)
     552         9350 :       CALL keyword_release(keyword)
     553              : 
     554              :       CALL keyword_create(keyword, __LOCATION__, name="PMTRANS_MOL", &
     555              :                           description="The probability of attempting a molecule translation of a given molecule type.", &
     556              :                           usage="PMTRANS_MOL {real} {real} ... ", &
     557         9350 :                           n_var=-1, type_of_var=real_t)
     558         9350 :       CALL section_add_keyword(section, keyword)
     559         9350 :       CALL keyword_release(keyword)
     560              : 
     561         9350 :    END SUBROUTINE create_mol_prob_section
     562              : 
     563              : ! **************************************************************************************************
     564              : !> \brief ...
     565              : !> \param section will contain the probabilities for attempting various moves
     566              : !>        on the box where the variable is present
     567              : !> \author matt
     568              : ! **************************************************************************************************
     569         9350 :    SUBROUTINE create_box_prob_section(section)
     570              :       TYPE(section_type), POINTER                        :: section
     571              : 
     572              :       TYPE(keyword_type), POINTER                        :: keyword
     573              : 
     574         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     575              : 
     576              :       CALL section_create(section, __LOCATION__, name="BOX_PROBABILITIES", &
     577              :                           description="Probabilities of attempting various moves types on "// &
     578              :                           "the box.", &
     579         9350 :                           n_keywords=2, n_subsections=0, repeats=.FALSE.)
     580              : 
     581         9350 :       NULLIFY (keyword)
     582              : 
     583              :       CALL keyword_create(keyword, __LOCATION__, name="PMHMC_BOX", &
     584              :                           description="The probability of attempting a HMC move on this box.", &
     585              :                           usage="PMHMC_BOX {real}", &
     586         9350 :                           type_of_var=real_t, default_r_val=1.0E0_dp)
     587         9350 :       CALL section_add_keyword(section, keyword)
     588         9350 :       CALL keyword_release(keyword)
     589              : 
     590              :       CALL keyword_create(keyword, __LOCATION__, name="PMVOL_BOX", &
     591              :                           description="The probability of attempting a volume move on this box (GEMC_NpT).", &
     592              :                           usage="PMVOL_BOX {real}", &
     593         9350 :                           type_of_var=real_t, default_r_val=1.0E0_dp)
     594         9350 :       CALL section_add_keyword(section, keyword)
     595         9350 :       CALL keyword_release(keyword)
     596              : 
     597              :       CALL keyword_create(keyword, __LOCATION__, name="PMCLUS_BOX", &
     598              :                           description="The probability of attempting a cluster move in this box", &
     599              :                           usage="PMCLUS_BOX {real}", &
     600         9350 :                           type_of_var=real_t, default_r_val=1.0E0_dp)
     601         9350 :       CALL section_add_keyword(section, keyword)
     602         9350 :       CALL keyword_release(keyword)
     603              : 
     604         9350 :    END SUBROUTINE create_box_prob_section
     605              : 
     606              : ! **************************************************************************************************
     607              : !> \brief ...
     608              : !> \param section will contain the frequency for updating maximum
     609              : !>        displacements for various moves
     610              : !> \author matt
     611              : ! **************************************************************************************************
     612         9350 :    SUBROUTINE create_update_section(section)
     613              :       TYPE(section_type), POINTER                        :: section
     614              : 
     615              :       TYPE(keyword_type), POINTER                        :: keyword
     616              : 
     617         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     618              : 
     619              :       CALL section_create(section, __LOCATION__, name="MOVE_UPDATES", &
     620              :                           description="Frequency for updating move maximum displacements.", &
     621         9350 :                           n_keywords=2, n_subsections=0, repeats=.FALSE.)
     622              : 
     623         9350 :       NULLIFY (keyword)
     624              : 
     625              :       CALL keyword_create(keyword, __LOCATION__, name="IUPVOLUME", &
     626              :                           description="Every iupvolume steps update maximum volume displacement.", &
     627              :                           usage="IUPVOLUME {integer}", &
     628         9350 :                           default_i_val=10000)
     629         9350 :       CALL section_add_keyword(section, keyword)
     630         9350 :       CALL keyword_release(keyword)
     631              : 
     632              :       CALL keyword_create(keyword, __LOCATION__, name="IUPTRANS", &
     633              :                           description="Every iuptrans steps update maximum "// &
     634              :                           "translation/rotation/configurational changes.", &
     635              :                           usage="IUPTRANS {integer}", &
     636         9350 :                           default_i_val=10000)
     637         9350 :       CALL section_add_keyword(section, keyword)
     638         9350 :       CALL keyword_release(keyword)
     639              : 
     640              :       CALL keyword_create(keyword, __LOCATION__, name="IUPCLTRANS", &
     641              :                           description="Every iupcltrans steps update maximum cluster translation.", &
     642              :                           usage="IUPCLTRANS {integer}", &
     643         9350 :                           default_i_val=10000)
     644         9350 :       CALL section_add_keyword(section, keyword)
     645         9350 :       CALL keyword_release(keyword)
     646              : 
     647         9350 :    END SUBROUTINE create_update_section
     648              : 
     649              : ! **************************************************************************************************
     650              : !> \brief ...
     651              : !> \param section will contain the maximum displacements for various moves
     652              : !> \author matt
     653              : ! **************************************************************************************************
     654         9350 :    SUBROUTINE create_max_disp_section(section)
     655              :       TYPE(section_type), POINTER                        :: section
     656              : 
     657              :       TYPE(section_type), POINTER                        :: subsection
     658              : 
     659         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     660              : 
     661              :       CALL section_create(section, __LOCATION__, name="max_displacements", &
     662              :                           description="The maximum displacements for all attempted moves.", &
     663         9350 :                           n_keywords=1, n_subsections=2, repeats=.FALSE.)
     664              : 
     665         9350 :       NULLIFY (subsection)
     666              : 
     667         9350 :       CALL create_mol_disp_section(subsection)
     668         9350 :       CALL section_add_subsection(section, subsection)
     669         9350 :       CALL section_release(subsection)
     670              : 
     671         9350 :       CALL create_box_disp_section(subsection)
     672         9350 :       CALL section_add_subsection(section, subsection)
     673         9350 :       CALL section_release(subsection)
     674              : 
     675         9350 :    END SUBROUTINE create_max_disp_section
     676              : 
     677              : ! **************************************************************************************************
     678              : !> \brief ...
     679              : !> \param section will contain the maximum displacements for all moves which
     680              : !>        require a value for each molecule type
     681              : !> \author matt
     682              : ! **************************************************************************************************
     683         9350 :    SUBROUTINE create_mol_disp_section(section)
     684              :       TYPE(section_type), POINTER                        :: section
     685              : 
     686              :       TYPE(keyword_type), POINTER                        :: keyword
     687              : 
     688         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     689              : 
     690              :       CALL section_create(section, __LOCATION__, name="mol_displacements", &
     691              :                           description="Maximum displacements for every move type that requires "// &
     692              :                           "a value for each molecular type in the simulation.", &
     693         9350 :                           n_keywords=5, n_subsections=0, repeats=.FALSE.)
     694              : 
     695         9350 :       NULLIFY (keyword)
     696              : 
     697              :       CALL keyword_create(keyword, __LOCATION__, name="RMBOND", &
     698              :                           description="Maximum bond length displacement, in angstroms, for each molecule type.", &
     699              :                           usage="RMBOND {real} {real} ... ", &
     700         9350 :                           n_var=-1, type_of_var=real_t)
     701         9350 :       CALL section_add_keyword(section, keyword)
     702         9350 :       CALL keyword_release(keyword)
     703              : 
     704              :       CALL keyword_create(keyword, __LOCATION__, name="RMANGLE", &
     705              :                           description="Maximum bond angle displacement, in degrees, for each molecule type.", &
     706              :                           usage="RMANGLE {real} {real} ...", &
     707         9350 :                           n_var=-1, type_of_var=real_t)
     708         9350 :       CALL section_add_keyword(section, keyword)
     709         9350 :       CALL keyword_release(keyword)
     710              : 
     711              :       CALL keyword_create(keyword, __LOCATION__, name="RMDIHEDRAL", &
     712              :                           description="Maximum dihedral angle distplacement, in degrees, for each molecule type.", &
     713              :                           usage="RMDIHEDRAL {real} {real} ... ", &
     714         9350 :                           n_var=-1, type_of_var=real_t)
     715         9350 :       CALL section_add_keyword(section, keyword)
     716         9350 :       CALL keyword_release(keyword)
     717              : 
     718              :       CALL keyword_create(keyword, __LOCATION__, name="RMROT", &
     719              :                           description="Maximum rotational displacement, in degrees, for each molecule type.", &
     720              :                           usage="RMROT {real} {real} ... ", &
     721         9350 :                           n_var=-1, type_of_var=real_t)
     722         9350 :       CALL section_add_keyword(section, keyword)
     723         9350 :       CALL keyword_release(keyword)
     724              : 
     725              :       CALL keyword_create(keyword, __LOCATION__, name="RMTRANS", &
     726              :                           description="Maximum translational displacement, in angstroms, for each molecule type.", &
     727              :                           usage="RMTRANS {real} {real} ...", &
     728         9350 :                           n_var=-1, type_of_var=real_t)
     729         9350 :       CALL section_add_keyword(section, keyword)
     730         9350 :       CALL keyword_release(keyword)
     731              : 
     732         9350 :    END SUBROUTINE create_mol_disp_section
     733              : 
     734              : ! **************************************************************************************************
     735              : !> \brief ...
     736              : !> \param section will contain the maximum displacements for any move that
     737              : !>        is done on each simulation box
     738              : !> \author matt
     739              : ! **************************************************************************************************
     740         9350 :    SUBROUTINE create_box_disp_section(section)
     741              :       TYPE(section_type), POINTER                        :: section
     742              : 
     743              :       TYPE(keyword_type), POINTER                        :: keyword
     744              : 
     745         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
     746              : 
     747              :       CALL section_create(section, __LOCATION__, name="BOX_DISPLACEMENTS", &
     748              :                           description="Maximum displacements for any move that is performed on each"// &
     749              :                           " simulation box.", &
     750         9350 :                           n_keywords=1, n_subsections=0, repeats=.FALSE.)
     751              : 
     752         9350 :       NULLIFY (keyword)
     753              : 
     754              :       CALL keyword_create(keyword, __LOCATION__, name="RMVOLUME", &
     755              :                           description="Maximum volume displacement, in angstrom**3.", &
     756              :                           usage="RMVOLUME {real}", &
     757         9350 :                           type_of_var=real_t)
     758         9350 :       CALL section_add_keyword(section, keyword)
     759         9350 :       CALL keyword_release(keyword)
     760              : 
     761              :       CALL keyword_create(keyword, __LOCATION__, name="RMCLTRANS", &
     762              :                           description="Maximum translational displacement, in angstroms, for each cluster.", &
     763              :                           usage="RMCLTRANS {real}", &
     764         9350 :                           default_r_val=1.0E0_dp)
     765         9350 :       CALL section_add_keyword(section, keyword)
     766         9350 :       CALL keyword_release(keyword)
     767              : 
     768         9350 :    END SUBROUTINE create_box_disp_section
     769              : 
     770              : ! **************************************************************************************************
     771              : !> \brief creates the geometry optimization section
     772              : !> \param section the section to be created
     773              : !> \param location ...
     774              : !> \param label ...
     775              : !> \param description ...
     776              : !> \param just_optimizers ...
     777              : !> \param use_model_hessian ...
     778              : !> \par History
     779              : !>      01.2020 keywords related to Space Group Symmetry added [pcazade]
     780              : !> \author teo
     781              : ! **************************************************************************************************
     782        37400 :    RECURSIVE SUBROUTINE create_geoopt_section(section, location, label, description, just_optimizers, use_model_hessian)
     783              :       TYPE(section_type), POINTER                        :: section
     784              :       CHARACTER(LEN=*), INTENT(IN)                       :: location, label, description
     785              :       LOGICAL, INTENT(IN)                                :: just_optimizers, use_model_hessian
     786              : 
     787              :       TYPE(keyword_type), POINTER                        :: keyword
     788              :       TYPE(section_type), POINTER                        :: print_key, subsection
     789              : 
     790        37400 :       CPASSERT(.NOT. ASSOCIATED(section))
     791              :       CALL section_create(section, location=location, name=label, description=description, &
     792        37400 :                           n_keywords=1, n_subsections=1, repeats=.FALSE.)
     793              : 
     794        37400 :       NULLIFY (keyword)
     795        37400 :       IF (.NOT. just_optimizers) THEN
     796              :          CALL keyword_create(keyword, __LOCATION__, name="TYPE", &
     797              :                              description="Specify which kind of geometry optimization to perform", &
     798              :                              usage="TYPE (MINIMIZATION|TRANSITION_STATE)", &
     799              :                              enum_c_vals=s2a("MINIMIZATION", "TRANSITION_STATE"), &
     800              :                              enum_desc=s2a("Performs a geometry minimization.", &
     801              :                                            "Performs a transition state optimization."), &
     802              :                              enum_i_vals=[default_minimization_method_id, default_ts_method_id], &
     803         9350 :                              default_i_val=default_minimization_method_id)
     804         9350 :          CALL section_add_keyword(section, keyword)
     805         9350 :          CALL keyword_release(keyword)
     806              :       END IF
     807              : 
     808              :       CALL keyword_create( &
     809              :          keyword, __LOCATION__, name="OPTIMIZER", &
     810              :          variants=["MINIMIZER"], &
     811              :          citations=[Byrd1995], &
     812              :          description="Specify which method to use to perform a geometry optimization.", &
     813              :          usage="OPTIMIZER {BFGS|LBFGS|CG}", &
     814              :          enum_c_vals=s2a("BFGS", "LBFGS", "CG"), &
     815              :          enum_desc=s2a("Most efficient minimizer, but only for 'small' systems, "// &
     816              :                        "as it relies on diagonalization of a full Hessian matrix", &
     817              :                        "Limited-memory variant of BFGS suitable for large systems. "// &
     818              :                        "Not as well fine-tuned but can be more robust.", &
     819              :                        "conjugate gradients, robust minimizer (depending on the line search) also OK for large systems"), &
     820              :          enum_i_vals=[default_bfgs_method_id, default_lbfgs_method_id, default_cg_method_id], &
     821       112200 :          default_i_val=default_bfgs_method_id)
     822        37400 :       CALL section_add_keyword(section, keyword)
     823        37400 :       CALL keyword_release(keyword)
     824              : 
     825              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_ITER", &
     826              :                           description="Specifies the maximum number of geometry optimization steps. "// &
     827              :                           "One step might imply several force evaluations for the CG and LBFGS optimizers.", &
     828              :                           usage="MAX_ITER {integer}", &
     829        37400 :                           default_i_val=200)
     830        37400 :       CALL section_add_keyword(section, keyword)
     831        37400 :       CALL keyword_release(keyword)
     832              : 
     833              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_DR", &
     834              :                           description="Convergence criterion for the maximum geometry change "// &
     835              :                           "between the current and the last optimizer iteration.", &
     836              :                           usage="MAX_DR {real}", &
     837        37400 :                           default_r_val=0.0030_dp, unit_str="bohr")
     838        37400 :       CALL section_add_keyword(section, keyword)
     839        37400 :       CALL keyword_release(keyword)
     840              : 
     841              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_FORCE", &
     842              :                           description="Convergence criterion for the maximum force component of the current configuration.", &
     843              :                           usage="MAX_FORCE {real}", &
     844        37400 :                           default_r_val=0.00045_dp, unit_str="hartree/bohr")
     845        37400 :       CALL section_add_keyword(section, keyword)
     846        37400 :       CALL keyword_release(keyword)
     847              : 
     848              :       CALL keyword_create(keyword, __LOCATION__, name="RMS_DR", &
     849              :                           description="Convergence criterion for the root mean square (RMS) geometry"// &
     850              :                           " change between the current and the last optimizer iteration.", &
     851              :                           usage="RMS_DR {real}", unit_str="bohr", &
     852        37400 :                           default_r_val=0.0015_dp)
     853        37400 :       CALL section_add_keyword(section, keyword)
     854        37400 :       CALL keyword_release(keyword)
     855              : 
     856              :       CALL keyword_create(keyword, __LOCATION__, name="RMS_FORCE", &
     857              :                           description="Convergence criterion for the root mean square (RMS) force of the current configuration.", &
     858              :                           usage="RMS_FORCE {real}", unit_str="hartree/bohr", &
     859        37400 :                           default_r_val=0.00030_dp)
     860        37400 :       CALL section_add_keyword(section, keyword)
     861        37400 :       CALL keyword_release(keyword)
     862              : 
     863              :       CALL keyword_create(keyword, __LOCATION__, name="step_start_val", &
     864              :                           description="The starting step value for the "//TRIM(label)//" module.", &
     865        37400 :                           usage="step_start_val <integer>", default_i_val=0)
     866        37400 :       CALL section_add_keyword(section, keyword)
     867        37400 :       CALL keyword_release(keyword)
     868              : 
     869              :       ! collects keywords related to Space Group Symmetry
     870              :       CALL keyword_create( &
     871              :          keyword, __LOCATION__, name="KEEP_SPACE_GROUP", &
     872              :          description="Detect space group of the system and preserve it during optimization. "// &
     873              :          "The space group symmetry is applied to coordinates, forces, and the stress tensor. "// &
     874              :          "It works for supercell. It does not affect/reduce computational cost. "// &
     875              :          "Use EPS_SYMMETRY to adjust the detection threshold.", &
     876              :          usage="KEEP_SPACE_GROUP .TRUE.", &
     877        37400 :          default_l_val=.FALSE., lone_keyword_l_val=.TRUE., repeats=.FALSE.)
     878        37400 :       CALL section_add_keyword(section, keyword)
     879        37400 :       CALL keyword_release(keyword)
     880              : 
     881              :       ! collects keywords related to Space Group Symmetry analysis
     882              :       CALL keyword_create( &
     883              :          keyword, __LOCATION__, name="SHOW_SPACE_GROUP", &
     884              :          description="Detect and show space group of the system after optimization. "// &
     885              :          "It works for supercell. It does not affect/reduce computational cost. "// &
     886              :          "Use EPS_SYMMETRY to adjust the detection threshold.", &
     887              :          usage="SHOW_SPACE_GROUP .TRUE.", &
     888        37400 :          default_l_val=.FALSE., lone_keyword_l_val=.TRUE., repeats=.FALSE.)
     889        37400 :       CALL section_add_keyword(section, keyword)
     890        37400 :       CALL keyword_release(keyword)
     891              : 
     892              :       ! collects keywords related to precision for finding the space group
     893              :       CALL keyword_create( &
     894              :          keyword, __LOCATION__, name="EPS_SYMMETRY", &
     895              :          description="Accuracy for space group determination. EPS_SYMMETRY is dimensionless. "// &
     896              :        "Roughly speaking, two scaled (fractional) atomic positions v1, v2 are considered identical if |v1 - v2| < EPS_SYMMETRY. ", &
     897              :          usage="EPS_SYMMETRY {REAL}", &
     898        37400 :          default_r_val=1.e-4_dp, repeats=.FALSE.)
     899        37400 :       CALL section_add_keyword(section, keyword)
     900        37400 :       CALL keyword_release(keyword)
     901              : 
     902              :       ! collects keywords related to reduction of symmetry due to an external field
     903              :       CALL keyword_create( &
     904              :          keyword, __LOCATION__, name="SYMM_REDUCTION", &
     905              :          description="Direction of the external static electric field. "// &
     906              :          "Some symmetry operations are not compatible with the direction of an electric field. "// &
     907              :          "These operations are used when enforcing the space group.", &
     908              :          usage="SYMM_REDUCTION  0.0 0.0 0.0", &
     909              :          repeats=.FALSE., n_var=3, &
     910        37400 :          type_of_var=real_t, default_r_vals=[0.0_dp, 0.0_dp, 0.0_dp])
     911        37400 :       CALL section_add_keyword(section, keyword)
     912        37400 :       CALL keyword_release(keyword)
     913              : 
     914              :       ! collects keywords related to ranges of atoms to symmetrize
     915              :       CALL keyword_create( &
     916              :          keyword, __LOCATION__, name="SYMM_EXCLUDE_RANGE", &
     917              :          description="Range of atoms to exclude from space group symmetry. "// &
     918              :          "These atoms are excluded from both identification and enforcement. "// &
     919              :          "This keyword can be repeated.", &
     920        37400 :          repeats=.TRUE., usage="SYMM_EXCLUDE_RANGE {Int} {Int}", type_of_var=integer_t, n_var=2)
     921        37400 :       CALL section_add_keyword(section, keyword)
     922        37400 :       CALL keyword_release(keyword)
     923              : 
     924              :       CALL keyword_create( &
     925              :          keyword, __LOCATION__, name="SPGR_PRINT_ATOMS", &
     926              :          description="Print equivalent atoms list for each space group symmetry operation.", &
     927        37400 :          default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
     928        37400 :       CALL section_add_keyword(section, keyword)
     929        37400 :       CALL keyword_release(keyword)
     930              : 
     931        37400 :       CALL create_lbfgs_section(subsection)
     932        37400 :       CALL section_add_subsection(section, subsection)
     933        37400 :       CALL section_release(subsection)
     934              : 
     935        37400 :       CALL create_cg_section(subsection)
     936        37400 :       CALL section_add_subsection(section, subsection)
     937        37400 :       CALL section_release(subsection)
     938              : 
     939        37400 :       CALL create_bfgs_section(subsection, use_model_hessian)
     940        37400 :       CALL section_add_subsection(section, subsection)
     941        37400 :       CALL section_release(subsection)
     942              : 
     943        37400 :       IF (.NOT. just_optimizers) THEN
     944              :          ! Transition states section
     945         9350 :          CALL create_ts_section(subsection)
     946         9350 :          CALL section_add_subsection(section, subsection)
     947         9350 :          CALL section_release(subsection)
     948              : 
     949              :          ! Create the PRINT subsection
     950         9350 :          NULLIFY (subsection)
     951              :          CALL section_create(subsection, __LOCATION__, name="PRINT", &
     952              :                              description="Controls the printing properties during a geometry optimization run", &
     953         9350 :                              n_keywords=0, n_subsections=1, repeats=.TRUE.)
     954         9350 :          NULLIFY (print_key)
     955              :          CALL cp_print_key_section_create( &
     956              :             print_key, __LOCATION__, "program_run_info", &
     957              :             description="Controls the printing of basic information during the Geometry Optimization", &
     958         9350 :             print_level=low_print_level, add_last=add_last_numeric, filename="__STD_OUT__")
     959         9350 :          CALL section_add_subsection(subsection, print_key)
     960         9350 :          CALL section_release(print_key)
     961         9350 :          CALL section_add_subsection(section, subsection)
     962         9350 :          CALL section_release(subsection)
     963              :       END IF
     964              : 
     965        37400 :    END SUBROUTINE create_geoopt_section
     966              : 
     967              : ! **************************************************************************************************
     968              : !> \brief creates the section for the shell-core optimization
     969              : !> \param section the section to be created
     970              : !> \author Caino
     971              : ! **************************************************************************************************
     972         9350 :    SUBROUTINE create_shellcore_opt_section(section)
     973              :       TYPE(section_type), POINTER                        :: section
     974              : 
     975              :       TYPE(section_type), POINTER                        :: print_key, subsection
     976              : 
     977              :       CALL create_geoopt_section( &
     978              :          section, __LOCATION__, label="SHELL_OPT", &
     979              :          description="This section sets the environment for the optimization of the shell-core distances"// &
     980              :          " that might turn to be necessary along a MD run using a shell-model potential."// &
     981              :          " The optimization procedure is activated when at least one of the shell-core"// &
     982              :          " pairs becomes too elongated, i.e. when the assumption of point dipole is not longer valid.", &
     983              :          just_optimizers=.TRUE., &
     984         9350 :          use_model_hessian=.FALSE.)
     985              : 
     986         9350 :       NULLIFY (print_key, subsection)
     987              : 
     988              :       ! Create the PRINT subsection
     989              :       NULLIFY (subsection)
     990              :       CALL section_create(subsection, __LOCATION__, name="PRINT", &
     991              :                           description="Controls the printing properties during a shell-core optimization procedure", &
     992         9350 :                           n_keywords=0, n_subsections=1, repeats=.TRUE.)
     993         9350 :       NULLIFY (print_key)
     994              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "program_run_info", &
     995              :                                        description="Controls the printing of basic information during the Optimization", &
     996         9350 :                                        print_level=low_print_level, add_last=add_last_numeric, filename="__STD_OUT__")
     997         9350 :       CALL section_add_subsection(subsection, print_key)
     998         9350 :       CALL section_release(print_key)
     999         9350 :       CALL section_add_subsection(section, subsection)
    1000         9350 :       CALL section_release(subsection)
    1001              : 
    1002         9350 :    END SUBROUTINE create_shellcore_opt_section
    1003              : 
    1004              : ! **************************************************************************************************
    1005              : !> \brief creates the section for the cell optimization
    1006              : !> \param section the section to be created
    1007              : !> \author Teodoro Laino [tlaino] - University of Zurich - 03.2008
    1008              : ! **************************************************************************************************
    1009         9350 :    SUBROUTINE create_cell_opt_section(section)
    1010              :       TYPE(section_type), POINTER                        :: section
    1011              : 
    1012              :       TYPE(keyword_type), POINTER                        :: keyword
    1013              :       TYPE(section_type), POINTER                        :: print_key, subsection
    1014              : 
    1015              :       CALL create_geoopt_section(section, __LOCATION__, label="CELL_OPT", &
    1016              :                                  description="This section sets the environment for the optimization of the simulation cell."// &
    1017              :                                  " Two possible schemes are available: (1) Zero temperature optimization;"// &
    1018              :                                  " (2) Finite temperature optimization.", &
    1019              :                                  just_optimizers=.TRUE., &
    1020         9350 :                                  use_model_hessian=.FALSE.)
    1021              : 
    1022         9350 :       NULLIFY (keyword, print_key, subsection)
    1023              :       CALL keyword_create( &
    1024              :          keyword, __LOCATION__, name="TYPE", &
    1025              :          description="Specify which kind of method to use for the optimization of the simulation cell", &
    1026              :          usage="TYPE (GEO_OPT|MD|DIRECT_CELL_OPT)", &
    1027              :          enum_c_vals=s2a("GEO_OPT", "MD", "DIRECT_CELL_OPT"), &
    1028              :          enum_desc=s2a( &
    1029              :          "Performs a geometry optimization (the GEO_OPT section must be defined) between cell optimization steps."// &
    1030              :          " The stress tensor is computed at the optimized geometry.", &
    1031              :          "Performs a molecular dynamics run (the MD section needs must defined) for computing the stress tensor"// &
    1032              :          " used for the cell optimization.", &
    1033              :          "Performs a geometry and cell optimization at the same time."// &
    1034              :          " The stress tensor is computed at every step"), &
    1035              :          enum_i_vals=[default_cell_geo_opt_id, default_cell_md_id, default_cell_direct_id], &
    1036         9350 :          default_i_val=default_cell_direct_id)
    1037         9350 :       CALL section_add_keyword(section, keyword)
    1038         9350 :       CALL keyword_release(keyword)
    1039              : 
    1040              :       CALL keyword_create( &
    1041              :          keyword, __LOCATION__, name="EXTERNAL_PRESSURE", &
    1042              :          description="Specifies the external pressure (1 value or the full 9 components of the pressure tensor) "// &
    1043              :          "applied during the cell optimization.", &
    1044              :          usage="EXTERNAL_PRESSURE {REAL} .. {REAL}", unit_str="bar", &
    1045              :          default_r_vals=[cp_unit_to_cp2k(100.0_dp, "bar"), 0.0_dp, 0.0_dp, &
    1046              :                          0.0_dp, cp_unit_to_cp2k(100.0_dp, "bar"), 0.0_dp, &
    1047        93500 :                          0.0_dp, 0.0_dp, cp_unit_to_cp2k(100.0_dp, "bar")], n_var=-1)
    1048         9350 :       CALL section_add_keyword(section, keyword)
    1049         9350 :       CALL keyword_release(keyword)
    1050              : 
    1051              :       CALL keyword_create( &
    1052              :          keyword, __LOCATION__, name="KEEP_ANGLES", &
    1053              :          description="Keep angles between the cell vectors constant, but allow the lengths of the"// &
    1054              :          " cell vectors to change independently."// &
    1055              :          " Albeit general, this is most useful for triclinic cells, to enforce higher symmetry, see KEEP_SYMMETRY.", &
    1056         9350 :          usage="KEEP_ANGLES TRUE", default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1057         9350 :       CALL section_add_keyword(section, keyword)
    1058         9350 :       CALL keyword_release(keyword)
    1059              : 
    1060              :       CALL keyword_create(keyword, __LOCATION__, name="KEEP_SYMMETRY", &
    1061              :                           description="Keep the requested initial cell symmetry (e.g. during a cell optimisation). "// &
    1062              :                           "The initial symmetry must be specified in the &CELL section.", &
    1063         9350 :                           usage="KEEP_SYMMETRY yes", default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1064         9350 :       CALL section_add_keyword(section, keyword)
    1065         9350 :       CALL keyword_release(keyword)
    1066              : 
    1067              :       CALL keyword_create( &
    1068              :          keyword, __LOCATION__, name="CONSTRAINT", &
    1069              :          description="Imposes a constraint on the pressure tensor by fixing the specified cell components.", &
    1070              :          usage="CONSTRAINT (none|x|y|z|xy|xz|yz)", &
    1071              :          enum_desc=s2a("Fix nothing", &
    1072              :                        "Fix only x component", &
    1073              :                        "Fix only y component", &
    1074              :                        "Fix only z component", &
    1075              :                        "Fix x and y component", &
    1076              :                        "Fix x and z component", &
    1077              :                        "Fix y and z component"), &
    1078              :          enum_c_vals=s2a("NONE", "X", "Y", "Z", "XY", "XZ", "YZ"), &
    1079              :          enum_i_vals=[fix_none, fix_x, fix_y, fix_z, fix_xy, fix_xz, fix_yz], &
    1080         9350 :          default_i_val=fix_none)
    1081         9350 :       CALL section_add_keyword(section, keyword)
    1082         9350 :       CALL keyword_release(keyword)
    1083              : 
    1084              :       CALL keyword_create(keyword, __LOCATION__, name="PRESSURE_TOLERANCE", &
    1085              :                           description="Specifies the Pressure tolerance (compared to the external pressure) to achieve "// &
    1086              :                           "during the cell optimization.", &
    1087              :                           usage="PRESSURE_TOLERANCE {REAL}", unit_str="bar", &
    1088         9350 :                           default_r_val=cp_unit_to_cp2k(100.0_dp, "bar"))
    1089         9350 :       CALL section_add_keyword(section, keyword)
    1090         9350 :       CALL keyword_release(keyword)
    1091              : 
    1092              :       ! Create the PRINT subsection
    1093         9350 :       NULLIFY (subsection)
    1094              :       CALL section_create(subsection, __LOCATION__, name="PRINT", &
    1095              :                           description="Controls the printing properties during a geometry optimization run", &
    1096         9350 :                           n_keywords=0, n_subsections=1, repeats=.TRUE.)
    1097         9350 :       NULLIFY (print_key)
    1098              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "program_run_info", &
    1099              :                                        description="Controls the printing of basic information during the Geometry Optimization", &
    1100         9350 :                                        print_level=low_print_level, add_last=add_last_numeric, filename="__STD_OUT__")
    1101         9350 :       CALL section_add_subsection(subsection, print_key)
    1102         9350 :       CALL section_release(print_key)
    1103              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "cell", &
    1104              :                               description="Controls the printing of the cell eveytime a calculation using a new cell is started.", &
    1105              :                                        print_level=low_print_level, add_last=add_last_numeric, filename="__STD_OUT__", &
    1106         9350 :                                        unit_str="angstrom")
    1107         9350 :       CALL section_add_subsection(subsection, print_key)
    1108         9350 :       CALL section_release(print_key)
    1109         9350 :       CALL section_add_subsection(section, subsection)
    1110         9350 :       CALL section_release(subsection)
    1111              : 
    1112         9350 :    END SUBROUTINE create_cell_opt_section
    1113              : 
    1114              : ! **************************************************************************************************
    1115              : !> \brief creates the section for tuning transition states search
    1116              : !> \param section the section to be created
    1117              : !> \author Teodoro Laino [tlaino] - University of Zurich - 01.2008
    1118              : ! **************************************************************************************************
    1119         9350 :    SUBROUTINE create_ts_section(section)
    1120              :       TYPE(section_type), POINTER                        :: section
    1121              : 
    1122              :       TYPE(keyword_type), POINTER                        :: keyword
    1123              :       TYPE(section_type), POINTER                        :: print_key, subsection, subsection2, &
    1124              :                                                             subsection3
    1125              : 
    1126              : ! Create the Transition State subsection
    1127              : 
    1128         9350 :       NULLIFY (section, keyword, subsection, subsection2)
    1129              :       CALL section_create(section, __LOCATION__, name="TRANSITION_STATE", &
    1130              :                           description="Specifies parameters to perform a transition state search", &
    1131         9350 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1132              : 
    1133              :       CALL keyword_create(keyword, __LOCATION__, name="METHOD", &
    1134              :                           description="Specify which kind of method to use for locating transition states", &
    1135              :                           citations=[Henkelman1999], &
    1136              :                           usage="METHOD (DIMER)", &
    1137              :                           enum_c_vals=s2a("DIMER"), &
    1138              :                           enum_desc=s2a("Uses the dimer method to optimize transition states."), &
    1139              :                           enum_i_vals=[default_dimer_method_id], &
    1140        18700 :                           default_i_val=default_dimer_method_id)
    1141         9350 :       CALL section_add_keyword(section, keyword)
    1142         9350 :       CALL keyword_release(keyword)
    1143              : 
    1144              :       CALL section_create(subsection, __LOCATION__, name="DIMER", &
    1145              :                           description="Specifies parameters for Dimer Method", &
    1146         9350 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1147              : 
    1148              :       CALL keyword_create(keyword, __LOCATION__, name="DR", &
    1149              :                           description="This keyword sets the value for the DR parameter.", &
    1150              :                           usage="DR {real}", unit_str='angstrom', &
    1151         9350 :                           default_r_val=cp_unit_to_cp2k(0.01_dp, "angstrom"))
    1152         9350 :       CALL section_add_keyword(subsection, keyword)
    1153         9350 :       CALL keyword_release(keyword)
    1154              : 
    1155              :       CALL keyword_create(keyword, __LOCATION__, name="INTERPOLATE_GRADIENT", &
    1156              :                           description="This keyword controls the interpolation of the gradient whenever possible"// &
    1157              :                           " during the optimization of the Dimer. The use of this keywords saves 1 evaluation"// &
    1158              :                           " of energy/forces.", usage="INTERPOLATE_GRADIENT {logical}", default_l_val=.TRUE., &
    1159         9350 :                           lone_keyword_l_val=.TRUE.)
    1160         9350 :       CALL section_add_keyword(subsection, keyword)
    1161         9350 :       CALL keyword_release(keyword)
    1162              : 
    1163              :       CALL keyword_create(keyword, __LOCATION__, name="ANGLE_TOLERANCE", &
    1164              :                           description="This keyword sets the value of the tolerance angle for the line search"// &
    1165              :                           " performed to optimize the orientation of the dimer.", &
    1166              :                           usage="ANGLE_TOLERANCE {real}", unit_str='rad', &
    1167         9350 :                           default_r_val=cp_unit_to_cp2k(5.0_dp, "deg"))
    1168         9350 :       CALL section_add_keyword(subsection, keyword)
    1169         9350 :       CALL keyword_release(keyword)
    1170              : 
    1171              :       CALL keyword_create(keyword, __LOCATION__, name="K-DIMER", &
    1172              :                           description="This keyword activates the constrained k-dimer translation"// &
    1173              :                           " J. Chem. Phys. 141, 164111 (2014).", &
    1174              :                           citations=[Henkelman2014], &
    1175              :                           usage="K-DIMER {logica}", &
    1176              :                           default_l_val=.FALSE., &
    1177        18700 :                           lone_keyword_l_val=.FALSE.)
    1178         9350 :       CALL section_add_keyword(subsection, keyword)
    1179         9350 :       CALL keyword_release(keyword)
    1180              : 
    1181              :       CALL keyword_create(keyword, __LOCATION__, name="BETA", &
    1182              :                           description="Exponential factor for the switching function used in K-DIMER", &
    1183              :                           usage="BETA {real}", &
    1184              :                           default_r_val=5.0_dp, &
    1185         9350 :                           lone_keyword_r_val=5.0_dp)
    1186         9350 :       CALL section_add_keyword(subsection, keyword)
    1187         9350 :       CALL keyword_release(keyword)
    1188              : 
    1189              :       CALL create_geoopt_section( &
    1190              :          subsection2, __LOCATION__, label="ROT_OPT", &
    1191              :          description="This section sets the environment for the optimization of the rotation of the Dimer.", &
    1192              :          just_optimizers=.TRUE., &
    1193         9350 :          use_model_hessian=.FALSE.)
    1194         9350 :       NULLIFY (subsection3)
    1195              :       CALL section_create(subsection3, __LOCATION__, name="PRINT", &
    1196              :                           description="Controls the printing properties during the dimer rotation optimization run", &
    1197         9350 :                           n_keywords=0, n_subsections=1, repeats=.TRUE.)
    1198         9350 :       NULLIFY (print_key)
    1199              : 
    1200              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "PROGRAM_RUN_INFO", &
    1201              :                                        description="Controls the printing of basic information during the Geometry Optimization", &
    1202         9350 :                                        print_level=low_print_level, add_last=add_last_numeric, filename="__STD_OUT__")
    1203         9350 :       CALL section_add_subsection(subsection3, print_key)
    1204         9350 :       CALL section_release(print_key)
    1205              : 
    1206              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ROTATIONAL_INFO", &
    1207              :                                        description="Controls the printing basic info during the cleaning of the "// &
    1208              :                                        "rotational degrees of freedom.", print_level=low_print_level, &
    1209         9350 :                                        add_last=add_last_numeric, filename="__STD_OUT__")
    1210              :       CALL keyword_create(keyword, __LOCATION__, name="COORDINATES", &
    1211              :                           description="Prints atomic coordinates after rotation", &
    1212         9350 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1213         9350 :       CALL section_add_keyword(print_key, keyword)
    1214         9350 :       CALL keyword_release(keyword)
    1215         9350 :       CALL section_add_subsection(subsection3, print_key)
    1216         9350 :       CALL section_release(print_key)
    1217              : 
    1218         9350 :       CALL section_add_subsection(subsection2, subsection3)
    1219         9350 :       CALL section_release(subsection3)
    1220         9350 :       CALL section_add_subsection(subsection, subsection2)
    1221         9350 :       CALL section_release(subsection2)
    1222              : 
    1223              :       CALL section_create(subsection2, __LOCATION__, name="DIMER_VECTOR", &
    1224              :                           description="Specifies the initial dimer vector (used frequently to restart DIMER calculations)."// &
    1225              :                           " If not provided the starting orientation of the dimer is chosen randomly.", &
    1226         9350 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1227              :       CALL keyword_create(keyword, __LOCATION__, name="_DEFAULT_KEYWORD_", &
    1228              :                           description="Specify on each line the components of the dimer vector.", repeats=.TRUE., &
    1229         9350 :                           usage="{Real} {Real} {Real}", type_of_var=real_t, n_var=-1)
    1230         9350 :       CALL section_add_keyword(subsection2, keyword)
    1231         9350 :       CALL keyword_release(keyword)
    1232         9350 :       CALL section_add_subsection(subsection, subsection2)
    1233         9350 :       CALL section_release(subsection2)
    1234              : 
    1235         9350 :       CALL section_add_subsection(section, subsection)
    1236         9350 :       CALL section_release(subsection)
    1237              : 
    1238         9350 :    END SUBROUTINE create_ts_section
    1239              : 
    1240              : ! **************************************************************************************************
    1241              : !> \brief creates the BFGS section
    1242              : !> \param section the section to be created
    1243              : !> \param use_model_hessian ...
    1244              : !> \author Teodoro Laino [tlaino] - University of Zurich - 01.2008
    1245              : ! **************************************************************************************************
    1246        37400 :    SUBROUTINE create_bfgs_section(section, use_model_hessian)
    1247              :       TYPE(section_type), POINTER                        :: section
    1248              :       LOGICAL, INTENT(IN)                                :: use_model_hessian
    1249              : 
    1250              :       TYPE(keyword_type), POINTER                        :: keyword
    1251              :       TYPE(section_type), POINTER                        :: print_key
    1252              : 
    1253              : ! create the BFGS subsection
    1254              : 
    1255        37400 :       NULLIFY (section, keyword, print_key)
    1256              :       CALL section_create(section, __LOCATION__, name="BFGS", &
    1257              :                           description="Provides parameters to tune the BFGS optimization", &
    1258        37400 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1259              : 
    1260              :       CALL keyword_create(keyword, __LOCATION__, name="TRUST_RADIUS", &
    1261              :                           description="Trust radius used in BFGS. Previously set to 0.1. "// &
    1262              :                           "Large values can lead to instabilities", &
    1263              :                           usage="TRUST_RADIUS {real}", unit_str='angstrom', &
    1264        37400 :                           default_r_val=cp_unit_to_cp2k(0.25_dp, "angstrom"))
    1265        37400 :       CALL section_add_keyword(section, keyword)
    1266        37400 :       CALL keyword_release(keyword)
    1267              : 
    1268              :       CALL keyword_create(keyword, __LOCATION__, name="USE_MODEL_HESSIAN", &
    1269              :                           description="Uses a model Hessian as initial guess instead of a unit matrix."// &
    1270              :                           " Should lead in general to improved convergence might be switched off for exotic cases", &
    1271              :                           usage="USE_MODEL_HESSIAN", &
    1272        37400 :                           default_l_val=use_model_hessian, lone_keyword_l_val=.TRUE.)
    1273        37400 :       CALL section_add_keyword(section, keyword)
    1274        37400 :       CALL keyword_release(keyword)
    1275              : 
    1276              :       CALL keyword_create(keyword, __LOCATION__, name="USE_RAT_FUN_OPT", &
    1277              :                           description="Includes a rational function optimization to determine the step."// &
    1278              :                           " Previously default but did not improve convergence in many cases", &
    1279              :                           usage="USE_RAT_FUN_OPT", &
    1280        37400 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1281        37400 :       CALL section_add_keyword(section, keyword)
    1282        37400 :       CALL keyword_release(keyword)
    1283              : 
    1284              :       CALL keyword_create(keyword, __LOCATION__, name="RESTART_HESSIAN", &
    1285              :                           description="Controls the reading of the initial Hessian from file.", &
    1286              :                           usage="RESTART_HESSIAN", &
    1287        37400 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1288        37400 :       CALL section_add_keyword(section, keyword)
    1289        37400 :       CALL keyword_release(keyword)
    1290              : 
    1291              :       CALL keyword_create(keyword, __LOCATION__, name="RESTART_FILE_NAME", &
    1292              :                           description="Specifies the name of the file used to read the initial Hessian.", &
    1293              :                           usage="RESTART_FILE_NAME {filename}", &
    1294        37400 :                           default_lc_val="")
    1295        37400 :       CALL section_add_keyword(section, keyword)
    1296        37400 :       CALL keyword_release(keyword)
    1297              : 
    1298              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "RESTART", &
    1299              :                                        description="Controls the printing of Hessian Restart file", &
    1300              :                                        print_level=low_print_level, add_last=add_last_numeric, filename="BFGS", &
    1301        37400 :                                        common_iter_levels=2)
    1302        37400 :       CALL section_add_subsection(section, print_key)
    1303        37400 :       CALL section_release(print_key)
    1304              : 
    1305        37400 :    END SUBROUTINE create_bfgs_section
    1306              : 
    1307              : ! **************************************************************************************************
    1308              : !> \brief creates the CG section
    1309              : !> \param section the section to be created
    1310              : !> \author Teodoro Laino [tlaino] - University of Zurich - 01.2008
    1311              : ! **************************************************************************************************
    1312        37400 :    SUBROUTINE create_cg_section(section)
    1313              :       TYPE(section_type), POINTER                        :: section
    1314              : 
    1315              :       TYPE(keyword_type), POINTER                        :: keyword
    1316              :       TYPE(section_type), POINTER                        :: subsection, subsubsection
    1317              : 
    1318              : ! create the CG subsection
    1319              : 
    1320        37400 :       NULLIFY (section, subsection, subsubsection, keyword)
    1321              :       CALL section_create(section, __LOCATION__, name="CG", &
    1322              :                           description="Provides parameters to tune the conjugate gradient optimization", &
    1323        37400 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1324              : 
    1325              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_STEEP_STEPS", &
    1326              :                           description="Maximum number of steepest descent steps before starting the"// &
    1327              :                           " conjugate gradients optimization.", &
    1328              :                           usage="MAX_STEEP_STEPS {integer}", &
    1329        37400 :                           default_i_val=0)
    1330        37400 :       CALL section_add_keyword(section, keyword)
    1331        37400 :       CALL keyword_release(keyword)
    1332              : 
    1333              :       CALL keyword_create(keyword, __LOCATION__, name="RESTART_LIMIT", &
    1334              :                           description="Cosine of the angle between two consecutive searching directions."// &
    1335              :                           " If the angle during a CG optimization is less than the one corresponding to"// &
    1336              :                           " to the RESTART_LIMIT the CG is reset and one step of steepest descent is"// &
    1337              :                           " performed.", &
    1338              :                           usage="RESTART_LIMIT {real}", &
    1339        37400 :                           default_r_val=0.9_dp)
    1340        37400 :       CALL section_add_keyword(section, keyword)
    1341        37400 :       CALL keyword_release(keyword)
    1342              : 
    1343              :       CALL keyword_create(keyword, __LOCATION__, name="FLETCHER_REEVES", &
    1344              :                           description="Uses FLETCHER-REEVES instead of POLAK-RIBIERE when using Conjugate Gradients", &
    1345              :                           usage="FLETCHER_REEVES", &
    1346        37400 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1347        37400 :       CALL section_add_keyword(section, keyword)
    1348        37400 :       CALL keyword_release(keyword)
    1349              : 
    1350              :       ! Line Search section
    1351              :       CALL section_create(subsection, __LOCATION__, name="LINE_SEARCH", &
    1352              :                           description="Provides parameters to tune the line search during the conjugate gradient optimization", &
    1353        37400 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1354              : 
    1355              :       CALL keyword_create(keyword, __LOCATION__, name="TYPE", &
    1356              :                           description="1D line search algorithm to be used with the CG optimizer,"// &
    1357              :                           " in increasing order of robustness and cost. ", &
    1358              :                           usage="TYPE GOLD", &
    1359              :                           default_i_val=ls_gold, &
    1360              :                           enum_c_vals=s2a("2PNT", "GOLD", "FIT"), &
    1361              :                           enum_desc=s2a("extrapolate based on 2 points", &
    1362              :                                         "perform 1D golden section search of the minimum (very expensive)", &
    1363              :                                         "perform 1D fit of a parabola on several evaluation of energy "// &
    1364              :                                         "(very expensive and more robust vs numerical noise)"), &
    1365        37400 :                           enum_i_vals=[ls_2pnt, ls_gold, ls_fit])
    1366        37400 :       CALL section_add_keyword(subsection, keyword)
    1367        37400 :       CALL keyword_release(keyword)
    1368              : 
    1369              :       ! 2PNT
    1370        37400 :       NULLIFY (subsubsection)
    1371              :       CALL section_create(subsubsection, __LOCATION__, name="2PNT", &
    1372              :                           description="Provides parameters to tune the line search for the two point based line search.", &
    1373        37400 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1374              : 
    1375              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_ALLOWED_STEP", &
    1376              :                           description="Max allowed value for the line search step.", &
    1377              :                           usage="MAX_ALLOWED_STEP {real}", unit_str="internal_cp2k", &
    1378        37400 :                           default_r_val=0.25_dp)
    1379        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1380        37400 :       CALL keyword_release(keyword)
    1381              : 
    1382              :       CALL keyword_create( &
    1383              :          keyword, __LOCATION__, name="LINMIN_GRAD_ONLY", &
    1384              :          description="Use only the gradient, not the energy for line minimizations (e.g. in conjugate gradients).", &
    1385              :          usage="LINMIN_GRAD_ONLY T", &
    1386        37400 :          default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1387        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1388        37400 :       CALL keyword_release(keyword)
    1389              : 
    1390        37400 :       CALL section_add_subsection(subsection, subsubsection)
    1391        37400 :       CALL section_release(subsubsection)
    1392              : 
    1393              :       ! GOLD
    1394        37400 :       NULLIFY (subsubsection)
    1395              :       CALL section_create(subsubsection, __LOCATION__, name="GOLD", &
    1396              :                           description="Provides parameters to tune the line search for the gold search.", &
    1397        37400 :                           n_keywords=0, n_subsections=1, repeats=.FALSE.)
    1398              : 
    1399              :       CALL keyword_create(keyword, __LOCATION__, name="INITIAL_STEP", &
    1400              :                           description="Initial step size used, e.g. for bracketing or minimizers. "// &
    1401              :                           "Might need to be reduced for systems with close contacts", &
    1402              :                           usage="INITIAL_STEP {real}", unit_str="internal_cp2k", &
    1403        37400 :                           default_r_val=0.2_dp)
    1404        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1405        37400 :       CALL keyword_release(keyword)
    1406              : 
    1407              :       CALL keyword_create(keyword, __LOCATION__, name="BRACK_LIMIT", &
    1408              :                           description="Limit in 1D bracketing during line search in Conjugate Gradients Optimization.", &
    1409              :                           usage="BRACK_LIMIT {real}", unit_str="internal_cp2k", &
    1410        37400 :                           default_r_val=100.0_dp)
    1411        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1412        37400 :       CALL keyword_release(keyword)
    1413              : 
    1414              :       CALL keyword_create(keyword, __LOCATION__, name="BRENT_TOL", &
    1415              :                           description="Tolerance requested during Brent line search in Conjugate Gradients Optimization.", &
    1416              :                           usage="BRENT_TOL {real}", unit_str="internal_cp2k", &
    1417        37400 :                           default_r_val=0.01_dp)
    1418        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1419        37400 :       CALL keyword_release(keyword)
    1420              : 
    1421              :       CALL keyword_create(keyword, __LOCATION__, name="BRENT_MAX_ITER", &
    1422              :                           description="Maximum number of iterations in brent algorithm "// &
    1423              :                           "(used for the line search in Conjugated Gradients Optimization)", &
    1424              :                           usage="BRENT_MAX_ITER {integer}", &
    1425        37400 :                           default_i_val=100)
    1426        37400 :       CALL section_add_keyword(subsubsection, keyword)
    1427        37400 :       CALL keyword_release(keyword)
    1428        37400 :       CALL section_add_subsection(subsection, subsubsection)
    1429        37400 :       CALL section_release(subsubsection)
    1430              : 
    1431        37400 :       CALL section_add_subsection(section, subsection)
    1432        37400 :       CALL section_release(subsection)
    1433        37400 :    END SUBROUTINE create_cg_section
    1434              : 
    1435              : ! **************************************************************************************************
    1436              : !> \brief creates the LBFGS section
    1437              : !> \param section the section to be created
    1438              : !> \author Teodoro Laino [tlaino] - University of Zurich - 01.2008
    1439              : ! **************************************************************************************************
    1440        37400 :    SUBROUTINE create_lbfgs_section(section)
    1441              :       TYPE(section_type), POINTER                        :: section
    1442              : 
    1443              :       TYPE(keyword_type), POINTER                        :: keyword
    1444              : 
    1445              : ! create the LBFGS section
    1446              : 
    1447        37400 :       NULLIFY (section, keyword)
    1448              :       CALL section_create(section, __LOCATION__, name="LBFGS", &
    1449              :                           description="Provides parameters to tune the limited memory BFGS (LBFGS) optimization", &
    1450              :                           n_keywords=0, n_subsections=1, repeats=.FALSE., &
    1451        74800 :                           citations=[Byrd1995])
    1452              : 
    1453              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_H_RANK", &
    1454              :                           description="Maximum rank (and consequently size) of the "// &
    1455              :                           "approximate Hessian matrix used by the LBFGS optimizer. "// &
    1456              :                           "Larger values (e.g. 30) will accelerate the convergence behaviour "// &
    1457              :                           "at the cost of a larger memory consumption.", &
    1458              :                           usage="MAX_H_RANK {integer}", &
    1459        37400 :                           default_i_val=5)
    1460        37400 :       CALL section_add_keyword(section, keyword)
    1461        37400 :       CALL keyword_release(keyword)
    1462              : 
    1463              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_F_PER_ITER", &
    1464              :                           description="Maximum number of force evaluations per iteration"// &
    1465              :                           " (used for the line search)", &
    1466              :                           usage="MAX_F_PER_ITER {integer}", &
    1467        37400 :                           default_i_val=20)
    1468        37400 :       CALL section_add_keyword(section, keyword)
    1469        37400 :       CALL keyword_release(keyword)
    1470              : 
    1471              :       CALL keyword_create(keyword, __LOCATION__, name="WANTED_PROJ_GRADIENT", &
    1472              :                           description="Convergence criterion (overrides the general ones):"// &
    1473              :                           " Requested norm threshold of the gradient multiplied"// &
    1474              :                           " by the approximate Hessian.", &
    1475              :                           usage="WANTED_PROJ_GRADIENT {real}", unit_str="internal_cp2k", &
    1476        37400 :                           default_r_val=1.0E-16_dp)
    1477        37400 :       CALL section_add_keyword(section, keyword)
    1478        37400 :       CALL keyword_release(keyword)
    1479              : 
    1480              :       CALL keyword_create(keyword, __LOCATION__, name="WANTED_REL_F_ERROR", &
    1481              :                           description="Convergence criterion (overrides the general ones):"// &
    1482              :                           " Requested relative error on the objective function"// &
    1483              :                           " of the optimizer (the energy)", &
    1484              :                           usage="WANTED_REL_F_ERROR {real}", unit_str="internal_cp2k", &
    1485        37400 :                           default_r_val=1.0E-16_dp)
    1486        37400 :       CALL section_add_keyword(section, keyword)
    1487        37400 :       CALL keyword_release(keyword)
    1488              : 
    1489              :       CALL keyword_create( &
    1490              :          keyword, __LOCATION__, name="TRUST_RADIUS", &
    1491              :          description="Trust radius used in LBFGS. Not completely in depth tested. Negativ values means no trust radius is used.", &
    1492              :          usage="TRUST_RADIUS {real}", unit_str='angstrom', &
    1493        37400 :          default_r_val=-1.0_dp)
    1494        37400 :       CALL section_add_keyword(section, keyword)
    1495        37400 :       CALL keyword_release(keyword)
    1496              : 
    1497        37400 :    END SUBROUTINE create_lbfgs_section
    1498              : 
    1499              : ! **************************************************************************************************
    1500              : !> \brief creates the flexible_partitioning section
    1501              : !> \param section the section to be created
    1502              : !> \author Joost VandeVondele [04.2006]
    1503              : ! **************************************************************************************************
    1504         9350 :    SUBROUTINE create_fp_section(section)
    1505              :       TYPE(section_type), POINTER                        :: section
    1506              : 
    1507              :       TYPE(keyword_type), POINTER                        :: keyword
    1508              :       TYPE(section_type), POINTER                        :: print_key
    1509              : 
    1510         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
    1511              :       CALL section_create(section, __LOCATION__, name="FLEXIBLE_PARTITIONING", &
    1512              :                           description="This section sets up flexible_partitioning", &
    1513         9350 :                           n_keywords=1, n_subsections=1, repeats=.FALSE.)
    1514              : 
    1515         9350 :       NULLIFY (keyword, print_key)
    1516              : 
    1517              :       CALL keyword_create(keyword, __LOCATION__, name="CENTRAL_ATOM", &
    1518              :                           description="Specifies the central atom.", &
    1519              :                           usage="CENTRAL_ATOM {integer}", &
    1520         9350 :                           n_var=1, type_of_var=integer_t)
    1521         9350 :       CALL section_add_keyword(section, keyword)
    1522         9350 :       CALL keyword_release(keyword)
    1523              : 
    1524              :       CALL keyword_create(keyword, __LOCATION__, name="INNER_ATOMS", &
    1525              :                           description="Specifies the list of atoms that should remain close to the central atom.", &
    1526              :                           usage="INNER_ATOMS {integer} {integer} .. {integer}", &
    1527         9350 :                           n_var=-1, type_of_var=integer_t)
    1528         9350 :       CALL section_add_keyword(section, keyword)
    1529         9350 :       CALL keyword_release(keyword)
    1530              : 
    1531              :       CALL keyword_create(keyword, __LOCATION__, name="OUTER_ATOMS", &
    1532              :                           description="Specifies the list of atoms that should remain far from the central atom.", &
    1533              :                           usage="OUTER_ATOMS {integer} {integer} .. {integer}", &
    1534         9350 :                           n_var=-1, type_of_var=integer_t)
    1535         9350 :       CALL section_add_keyword(section, keyword)
    1536         9350 :       CALL keyword_release(keyword)
    1537              : 
    1538              :       CALL keyword_create(keyword, __LOCATION__, name="INNER_RADIUS", &
    1539              :                           description="radius of the inner wall", &
    1540              :                           usage="INNER_RADIUS {real} ", type_of_var=real_t, &
    1541         9350 :                           n_var=1, unit_str="angstrom")
    1542         9350 :       CALL section_add_keyword(section, keyword)
    1543         9350 :       CALL keyword_release(keyword)
    1544              : 
    1545              :       CALL keyword_create(keyword, __LOCATION__, name="OUTER_RADIUS", &
    1546              :                           description="radius of the outer wall", &
    1547              :                           usage="OUTER_RADIUS {real} ", type_of_var=real_t, &
    1548         9350 :                           n_var=1, unit_str="angstrom")
    1549         9350 :       CALL section_add_keyword(section, keyword)
    1550         9350 :       CALL keyword_release(keyword)
    1551              : 
    1552              :       CALL keyword_create(keyword, __LOCATION__, name="STRENGTH", &
    1553              :                           description="Sets the force constant of the repulsive harmonic potential", &
    1554         9350 :                           usage="STRENGTH 1.0", default_r_val=1.0_dp)
    1555         9350 :       CALL section_add_keyword(section, keyword)
    1556         9350 :       CALL keyword_release(keyword)
    1557              : 
    1558              :       CALL keyword_create(keyword, __LOCATION__, name="BIAS", &
    1559              :                           description="If a bias potential counter-acting the weight term should be applied (recommended).", &
    1560         9350 :                           usage="BIAS F", default_l_val=.TRUE., lone_keyword_l_val=.TRUE.)
    1561         9350 :       CALL section_add_keyword(section, keyword)
    1562         9350 :       CALL keyword_release(keyword)
    1563              : 
    1564              :       CALL keyword_create(keyword, __LOCATION__, name="TEMPERATURE", &
    1565              :                           description="Sets the temperature parameter that is used in the baising potential."// &
    1566              :                           " It is recommended to use the actual simulation temperature", &
    1567         9350 :                           usage="TEMPERATURE 300", default_r_val=300.0_dp, unit_str='K')
    1568         9350 :       CALL section_add_keyword(section, keyword)
    1569         9350 :       CALL keyword_release(keyword)
    1570              : 
    1571              :       CALL keyword_create(keyword, __LOCATION__, name="SMOOTH_WIDTH", &
    1572              :                           description="Sets the width of the smooth counting function.", &
    1573         9350 :                           usage="SMOOTH_WIDTH 0.2", default_r_val=0.02_dp, unit_str='angstrom')
    1574         9350 :       CALL section_add_keyword(section, keyword)
    1575         9350 :       CALL keyword_release(keyword)
    1576              : 
    1577              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "WEIGHTS", &
    1578              :                                        description="Controls the printing of FP info during flexible partitioning simulations.", &
    1579              :                                        print_level=low_print_level, common_iter_levels=1, &
    1580         9350 :                                        filename="FLEXIBLE_PARTIONING")
    1581         9350 :       CALL section_add_subsection(section, print_key)
    1582         9350 :       CALL section_release(print_key)
    1583              : 
    1584              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "CONTROL", &
    1585              :                                        description="Controls the printing of FP info at startup", &
    1586              :                                        print_level=low_print_level, common_iter_levels=1, &
    1587         9350 :                                        filename="__STD_OUT__")
    1588         9350 :       CALL section_add_subsection(section, print_key)
    1589         9350 :       CALL section_release(print_key)
    1590              : 
    1591         9350 :    END SUBROUTINE create_fp_section
    1592              : 
    1593              : ! **************************************************************************************************
    1594              : !> \brief ...
    1595              : !> \param section will contain the driver section
    1596              : !> \author mceriotti
    1597              : ! **************************************************************************************************
    1598         9350 :    SUBROUTINE create_driver_section(section)
    1599              :       TYPE(section_type), POINTER                        :: section
    1600              : 
    1601              :       TYPE(keyword_type), POINTER                        :: keyword
    1602              : 
    1603         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
    1604              :       CALL section_create(section, __LOCATION__, name="DRIVER", &
    1605              :                           description="This section defines the parameters needed to run in i-PI driver mode.", &
    1606              :                           citations=[Ceriotti2014, Kapil2016], &
    1607        28050 :                           n_keywords=3, n_subsections=0, repeats=.FALSE.)
    1608              : 
    1609         9350 :       NULLIFY (keyword)
    1610              :       CALL keyword_create(keyword, __LOCATION__, name="unix", &
    1611              :                           description="Use a UNIX socket rather than an INET socket.", &
    1612              :                           usage="unix LOGICAL", &
    1613         9350 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    1614         9350 :       CALL section_add_keyword(section, keyword)
    1615         9350 :       CALL keyword_release(keyword)
    1616              : 
    1617              :       CALL keyword_create(keyword, __LOCATION__, name="port", &
    1618              :                           description="Port number for the i-PI server.", &
    1619              :                           usage="port <INTEGER>", &
    1620         9350 :                           default_i_val=12345)
    1621         9350 :       CALL section_add_keyword(section, keyword)
    1622         9350 :       CALL keyword_release(keyword)
    1623              : 
    1624              :       CALL keyword_create(keyword, __LOCATION__, name="host", &
    1625              :                           description="Host name for the i-PI server.", &
    1626              :                           usage="host <HOSTNAME>", &
    1627         9350 :                           default_c_val="localhost")
    1628         9350 :       CALL section_add_keyword(section, keyword)
    1629         9350 :       CALL keyword_release(keyword)
    1630              : 
    1631              :       CALL keyword_create(keyword, __LOCATION__, name="SLEEP_TIME", &
    1632              :                           description="Sleeping time while waiting for for driver commands [s].", &
    1633              :                           usage="SLEEP_TIME 0.1", &
    1634         9350 :                           default_r_val=0.01_dp)
    1635         9350 :       CALL section_add_keyword(section, keyword)
    1636         9350 :       CALL keyword_release(keyword)
    1637              : 
    1638         9350 :    END SUBROUTINE create_driver_section
    1639              : 
    1640              : ! **************************************************************************************************
    1641              : !> \brief creates the section for a path integral run
    1642              : !> \param section will contain the pint section
    1643              : !> \author fawzi
    1644              : ! **************************************************************************************************
    1645         9350 :    SUBROUTINE create_pint_section(section)
    1646              :       TYPE(section_type), POINTER                        :: section
    1647              : 
    1648              :       TYPE(keyword_type), POINTER                        :: keyword
    1649              :       TYPE(section_type), POINTER                        :: print_key, subsection, subsubsection
    1650              : 
    1651         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
    1652              :       CALL section_create(section, __LOCATION__, name="PINT", &
    1653              :                           description="The section that controls a path integral run", &
    1654         9350 :                           n_keywords=13, n_subsections=9, repeats=.FALSE.)
    1655         9350 :       NULLIFY (keyword)
    1656              : 
    1657              :       CALL keyword_create(keyword, __LOCATION__, name="p", &
    1658              :                           description="Specify number beads to use", repeats=.FALSE., &
    1659         9350 :                           default_i_val=3)
    1660         9350 :       CALL section_add_keyword(section, keyword)
    1661         9350 :       CALL keyword_release(keyword)
    1662              :       CALL keyword_create(keyword, __LOCATION__, name="proc_per_replica", &
    1663              :                           description="Specify number of processors to use for each replica", &
    1664         9350 :                           repeats=.FALSE., default_i_val=0)
    1665         9350 :       CALL section_add_keyword(section, keyword)
    1666         9350 :       CALL keyword_release(keyword)
    1667              :       CALL keyword_create(keyword, __LOCATION__, name="num_steps", &
    1668              :                           description="Number of steps (if MAX_STEP is not explicitly given"// &
    1669              :                           " the program will perform this number of steps)", repeats=.FALSE., &
    1670         9350 :                           default_i_val=3)
    1671         9350 :       CALL section_add_keyword(section, keyword)
    1672         9350 :       CALL keyword_release(keyword)
    1673              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_STEP", &
    1674              :                           description="Maximum step number (the program will stop if"// &
    1675              :                           " ITERATION >= MAX_STEP even if NUM_STEPS has not been reached)", &
    1676         9350 :                           repeats=.FALSE., default_i_val=10)
    1677         9350 :       CALL section_add_keyword(section, keyword)
    1678         9350 :       CALL keyword_release(keyword)
    1679              :       CALL keyword_create(keyword, __LOCATION__, name="iteration", &
    1680              :                           description="Specify the iteration number from which it should be "// &
    1681         9350 :                           "counted", default_i_val=0)
    1682         9350 :       CALL section_add_keyword(section, keyword)
    1683         9350 :       CALL keyword_release(keyword)
    1684              :       CALL keyword_create(keyword, __LOCATION__, name="Temp", &
    1685              :                           description="The temperature you want to simulate", &
    1686              :                           default_r_val=cp_unit_to_cp2k(300._dp, "K"), &
    1687         9350 :                           unit_str="K")
    1688         9350 :       CALL section_add_keyword(section, keyword)
    1689         9350 :       CALL keyword_release(keyword)
    1690              :       CALL keyword_create(keyword, __LOCATION__, name="kT_CORRECTION", &
    1691              :                           description="Corrects for the loss of temperature due to constrained "// &
    1692              :                           "degrees of freedom for Nose-Hover chains and numeric integration", &
    1693         9350 :                           repeats=.FALSE., default_l_val=.FALSE.)
    1694         9350 :       CALL section_add_keyword(section, keyword)
    1695         9350 :       CALL keyword_release(keyword)
    1696              :       CALL keyword_create(keyword, __LOCATION__, name="T_tol", variants=["temp_to"], &
    1697              :                           description="threshold for the oscillations of the temperature "// &
    1698              :                           "excedeed which the temperature is rescaled. 0 means no rescaling.", &
    1699        18700 :                           default_r_val=0._dp, unit_str="K")
    1700         9350 :       CALL section_add_keyword(section, keyword)
    1701         9350 :       CALL keyword_release(keyword)
    1702              :       CALL keyword_create(keyword, __LOCATION__, name="dt", &
    1703              :                           description="timestep (might be subdivised in nrespa subtimesteps", &
    1704              :                           repeats=.FALSE., &
    1705              :                           default_r_val=cp_unit_to_cp2k(1.0_dp, "fs"), &
    1706         9350 :                           usage="dt 1.0", unit_str="fs")
    1707         9350 :       CALL section_add_keyword(section, keyword)
    1708         9350 :       CALL keyword_release(keyword)
    1709              :       CALL keyword_create(keyword, __LOCATION__, name="HARM_INT", &
    1710              :                           description="integrator scheme for integrating the harmonic bead springs.", &
    1711              :                           usage="HARM_INT (NUMERIC|EXACT)", &
    1712              :                           default_i_val=integrate_numeric, &
    1713              :                           enum_c_vals=s2a("NUMERIC", "EXACT"), &
    1714         9350 :                           enum_i_vals=[integrate_numeric, integrate_exact])
    1715         9350 :       CALL section_add_keyword(section, keyword)
    1716         9350 :       CALL keyword_release(keyword)
    1717              :       CALL keyword_create(keyword, __LOCATION__, name="nrespa", &
    1718              :                           description="number of respa steps for the bead for each md step", &
    1719         9350 :                           repeats=.FALSE., default_i_val=5)
    1720         9350 :       CALL section_add_keyword(section, keyword)
    1721         9350 :       CALL keyword_release(keyword)
    1722              : 
    1723              :       CALL keyword_create(keyword, __LOCATION__, name="transformation", &
    1724              :                           description="Specifies the coordinate transformation to use", &
    1725              :                           usage="TRANSFORMATION (NORMAL|STAGE)", &
    1726              :                           default_i_val=transformation_normal, &
    1727              :                           enum_c_vals=s2a("NORMAL", "STAGE"), &
    1728         9350 :                           enum_i_vals=[transformation_normal, transformation_stage])
    1729              : 
    1730         9350 :       CALL section_add_keyword(section, keyword)
    1731         9350 :       CALL keyword_release(keyword)
    1732              :       CALL keyword_create(keyword, __LOCATION__, name="propagator", &
    1733              :                           description="Specifies the real time propagator to use", &
    1734              :                           usage="PROPAGATOR (PIMD|RPMD|CMD)", &
    1735              :                           default_i_val=propagator_pimd, &
    1736              :                           enum_c_vals=s2a("PIMD", "RPMD", "CMD"), &
    1737         9350 :                           enum_i_vals=[propagator_pimd, propagator_rpmd, propagator_cmd])
    1738         9350 :       CALL section_add_keyword(section, keyword)
    1739         9350 :       CALL keyword_release(keyword)
    1740              :       CALL keyword_create(keyword, __LOCATION__, name="FIX_CENTROID_POS", &
    1741              :                           description="Propagate all DOF but the centroid - "// &
    1742              :                           "useful for equilibration of the non-centroid modes "// &
    1743              :                           "(activated only if TRANSFORMATION==NORMAL)", &
    1744              :                           repeats=.FALSE., default_l_val=.FALSE., &
    1745         9350 :                           lone_keyword_l_val=.TRUE.)
    1746         9350 :       CALL section_add_keyword(section, keyword)
    1747         9350 :       CALL keyword_release(keyword)
    1748              : 
    1749         9350 :       NULLIFY (subsection, subsubsection)
    1750              :       CALL section_create(subsection, __LOCATION__, name="NORMALMODE", &
    1751              :                           description="Controls the normal mode transformation", &
    1752         9350 :                           n_keywords=3, n_subsections=0, repeats=.FALSE.)
    1753              :       CALL keyword_create(keyword, __LOCATION__, name="Q_CENTROID", &
    1754              :                           description="Value of the thermostat mass of centroid degree of freedom", &
    1755         9350 :                           repeats=.FALSE., default_r_val=-1.0_dp)
    1756         9350 :       CALL section_add_keyword(subsection, keyword)
    1757         9350 :       CALL keyword_release(keyword)
    1758              :       CALL keyword_create(keyword, __LOCATION__, name="Q_BEAD", &
    1759              :                           description="Value of the thermostat mass of non-centroid degrees of freedom", &
    1760         9350 :                           repeats=.FALSE., default_r_val=-1.0_dp)
    1761         9350 :       CALL section_add_keyword(subsection, keyword)
    1762         9350 :       CALL keyword_release(keyword)
    1763              :       CALL keyword_create(keyword, __LOCATION__, name="MODEFACTOR", &
    1764              :                           description="mass scale factor for non-centroid degrees of freedom", &
    1765         9350 :                           repeats=.FALSE., default_r_val=1.0_dp)
    1766         9350 :       CALL section_add_keyword(subsection, keyword)
    1767         9350 :       CALL keyword_release(keyword)
    1768              :       CALL keyword_create(keyword, __LOCATION__, name="GAMMA", &
    1769              :                           description="mass scale factor for non-centroid degrees of freedom, &
    1770              : &                                       naming convention according to Witt, 2008, <https://doi.org/10.1063/1.3125009>.", &
    1771         9350 :                           repeats=.FALSE., default_r_val=8.0_dp)
    1772         9350 :       CALL section_add_keyword(subsection, keyword)
    1773         9350 :       CALL keyword_release(keyword)
    1774              : 
    1775         9350 :       CALL section_add_subsection(section, subsection)
    1776         9350 :       CALL section_release(subsection)
    1777              : 
    1778              :       CALL section_create(subsection, __LOCATION__, name="staging", &
    1779              :                           description="The section that controls the staging transformation", &
    1780         9350 :                           n_keywords=2, n_subsections=0, repeats=.FALSE.)
    1781              :       CALL keyword_create(keyword, __LOCATION__, name="j", &
    1782              :                           description="Value of the j parameter for the staging transformation", &
    1783         9350 :                           repeats=.FALSE., default_i_val=2)
    1784         9350 :       CALL section_add_keyword(subsection, keyword)
    1785         9350 :       CALL keyword_release(keyword)
    1786              :       CALL keyword_create(keyword, __LOCATION__, name="Q_END", &
    1787              :                           description="Value of the nose-hoover mass for the endbead (Q_end)", &
    1788         9350 :                           repeats=.FALSE., default_i_val=2)
    1789         9350 :       CALL section_add_keyword(subsection, keyword)
    1790         9350 :       CALL keyword_release(keyword)
    1791         9350 :       CALL section_add_subsection(section, subsection)
    1792         9350 :       CALL section_release(subsection)
    1793              : 
    1794              :       CALL section_create(subsection, __LOCATION__, name="BEADS", &
    1795              :                           description="Sets positions and velocities of the beads", &
    1796              :                           n_keywords=0, n_subsections=2, &
    1797         9350 :                           repeats=.FALSE.)
    1798         9350 :       CALL create_coord_section(subsubsection, "BEADS")
    1799         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1800         9350 :       CALL section_release(subsubsection)
    1801         9350 :       CALL create_velocity_section(subsubsection, "BEADS")
    1802         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1803         9350 :       CALL section_release(subsubsection)
    1804         9350 :       CALL section_add_subsection(section, subsection)
    1805         9350 :       CALL section_release(subsection)
    1806              : 
    1807              :       CALL section_create(subsection, __LOCATION__, name="NOSE", &
    1808              :                           description="Controls the Nose-Hoover thermostats", &
    1809              :                           n_keywords=1, n_subsections=2, &
    1810         9350 :                           repeats=.FALSE.)
    1811              :       CALL keyword_create(keyword, __LOCATION__, name="nnos", &
    1812              :                           description="length of nose-hoover chain. 0 means no thermostat", &
    1813         9350 :                           repeats=.FALSE., default_i_val=2)
    1814         9350 :       CALL section_add_keyword(subsection, keyword)
    1815         9350 :       CALL keyword_release(keyword)
    1816         9350 :       CALL create_coord_section(subsubsection, "NOSE")
    1817         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1818         9350 :       CALL section_release(subsubsection)
    1819         9350 :       CALL create_velocity_section(subsubsection, "NOSE")
    1820         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1821         9350 :       CALL section_release(subsubsection)
    1822         9350 :       CALL section_add_subsection(section, subsection)
    1823         9350 :       CALL section_release(subsection)
    1824              : 
    1825         9350 :       CALL create_gle_section(subsection)
    1826         9350 :       CALL section_add_subsection(section, subsection)
    1827         9350 :       CALL section_release(subsection)
    1828              : 
    1829              :       CALL section_create(subsection, __LOCATION__, name="PILE", &
    1830              :                           description="Controls the PI Langevin Equation thermostat."// &
    1831              :                           " Needs the exact harmonic integrator."// &
    1832              :                           " May lead to unphysical motions if constraint e.g. FIXED_ATOMS, is applied."// &
    1833              :                           " RESTART_HELIUM section has to be .FALSE. when restarting the PIGLET job.", &
    1834              :                           citations=[Ceriotti2010], &
    1835              :                           n_keywords=3, n_subsections=1, &
    1836        18700 :                           repeats=.FALSE.)
    1837         9350 :       CALL create_rng_section(subsubsection)
    1838         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1839         9350 :       CALL section_release(subsubsection)
    1840              :       CALL keyword_create(keyword, __LOCATION__, name="TAU", &
    1841              :                           description="Time constant for centroid motion. "// &
    1842              :                           "If zero or negative the centroid is not thermostated.", &
    1843              :                           usage="TAU {real}", type_of_var=real_t, &
    1844         9350 :                           unit_str="fs", n_var=1, default_r_val=1000.0_dp)
    1845         9350 :       CALL section_add_keyword(subsection, keyword)
    1846         9350 :       CALL keyword_release(keyword)
    1847              :       CALL keyword_create(keyword, __LOCATION__, name="LAMBDA", &
    1848              :                           description="Scaling of friction to mode coupling", &
    1849              :                           usage="LAMBDA {real}", type_of_var=real_t, &
    1850         9350 :                           n_var=1, default_r_val=0.5_dp)
    1851         9350 :       CALL section_add_keyword(subsection, keyword)
    1852         9350 :       CALL keyword_release(keyword)
    1853              :       CALL keyword_create(keyword, __LOCATION__, name="THERMOSTAT_ENERGY", &
    1854              :                           description="Thermostat energy for conserved quantity. "// &
    1855              :                           "Only useful in restart files.", &
    1856              :                           usage="THERMOSTAT_ENERGY {real}", type_of_var=real_t, &
    1857         9350 :                           n_var=1, default_r_val=0.0_dp)
    1858         9350 :       CALL section_add_keyword(subsection, keyword)
    1859         9350 :       CALL keyword_release(keyword)
    1860         9350 :       CALL section_add_subsection(section, subsection)
    1861         9350 :       CALL section_release(subsection)
    1862              : 
    1863              :       CALL section_create(subsection, __LOCATION__, name="PIGLET", &
    1864              :                           description="Controls the PI Generalized Langevin Equation thermostat."// &
    1865              :                           " Needs the exact harmonic integrator", &
    1866              :                           citations=[Ceriotti2012], &
    1867              :                           n_keywords=4, n_subsections=2, &
    1868        18700 :                           repeats=.FALSE.)
    1869         9350 :       CALL create_rng_section(subsubsection)
    1870         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1871         9350 :       CALL section_release(subsubsection)
    1872              :       CALL section_create(subsubsection, __LOCATION__, name="EXTRA_DOF", &
    1873              :                           description="Additional degrees of freedom to ensure Markovian Dynamics.", &
    1874         9350 :                           n_keywords=1, n_subsections=0, repeats=.FALSE.)
    1875              :       CALL keyword_create(keyword, __LOCATION__, name="_DEFAULT_KEYWORD_", &
    1876              :                           description="Restart values for additional degrees of freedom" &
    1877              :                           //" (only for restarts, do not set explicitly)", &
    1878              :                           repeats=.FALSE., &
    1879         9350 :                           type_of_var=real_t, n_var=-1)
    1880         9350 :       CALL section_add_keyword(subsubsection, keyword)
    1881         9350 :       CALL keyword_release(keyword)
    1882         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1883         9350 :       CALL section_release(subsubsection)
    1884              :       CALL keyword_create(keyword, __LOCATION__, name="NEXTRA_DOF", &
    1885              :                           description="Number of extra degrees of freedom to ensure markovian dynamics", &
    1886         9350 :                           repeats=.FALSE., default_i_val=8)
    1887         9350 :       CALL section_add_keyword(subsection, keyword)
    1888         9350 :       CALL keyword_release(keyword)
    1889              :       CALL keyword_create(keyword, __LOCATION__, name="MATRICES_FILE_NAME", &
    1890              :                           description="Filename containig the raw matrices from "// &
    1891              :                           "<https://gle4md.org/index.html?page=matrix>.", &
    1892         9350 :                           repeats=.FALSE., default_lc_val="PIGLET.MAT")
    1893         9350 :       CALL section_add_keyword(subsection, keyword)
    1894         9350 :       CALL keyword_release(keyword)
    1895              :       CALL keyword_create(keyword, __LOCATION__, name="SMATRIX_INIT", &
    1896              :                           description="Select algorithm to initialize piglet S-matrices", &
    1897              :                           usage="SMATRIX_INIT (CHOLESKY|DIAGONAL)", &
    1898              :                           default_i_val=matrix_init_cholesky, &
    1899              :                           enum_c_vals=s2a("CHOLESKY", "DIAGONAL"), &
    1900         9350 :                           enum_i_vals=[matrix_init_cholesky, matrix_init_diagonal])
    1901         9350 :       CALL section_add_keyword(subsection, keyword)
    1902         9350 :       CALL keyword_release(keyword)
    1903              :       CALL keyword_create(keyword, __LOCATION__, name="THERMOSTAT_ENERGY", &
    1904              :                           description="Thermostat energy for conserved quantity. "// &
    1905              :                           "Only useful in restart files.", &
    1906              :                           usage="THERMOSTAT_ENERGY {real}", type_of_var=real_t, &
    1907         9350 :                           n_var=1, default_r_val=0.0_dp)
    1908         9350 :       CALL section_add_keyword(subsection, keyword)
    1909         9350 :       CALL keyword_release(keyword)
    1910         9350 :       CALL section_add_subsection(section, subsection)
    1911         9350 :       CALL section_release(subsection)
    1912              : 
    1913              :       CALL section_create(subsection, __LOCATION__, name="QTB", &
    1914              :                           description="Controls the QTB-PILE thermostat."// &
    1915              :                           " Needs the exact harmonic integrator", &
    1916              :                           citations=[Brieuc2016], &
    1917              :                           n_keywords=7, n_subsections=1, &
    1918        18700 :                           repeats=.FALSE.)
    1919         9350 :       CALL create_rng_section(subsubsection)
    1920         9350 :       CALL section_add_subsection(subsection, subsubsection)
    1921         9350 :       CALL section_release(subsubsection)
    1922              :       CALL keyword_create(keyword, __LOCATION__, name="TAU", &
    1923              :                           description="Time constant for centroid motion. ", &
    1924              :                           usage="TAU {real}", type_of_var=real_t, &
    1925         9350 :                           unit_str="fs", n_var=1, default_r_val=1000.0_dp)
    1926         9350 :       CALL section_add_keyword(subsection, keyword)
    1927         9350 :       CALL keyword_release(keyword)
    1928              :       CALL keyword_create(keyword, __LOCATION__, name="LAMBDA", &
    1929              :                           description="Scaling of friction to ring polymer NM freq.", &
    1930              :                           usage="LAMBDA {real}", type_of_var=real_t, &
    1931         9350 :                           n_var=1, default_r_val=0.5_dp)
    1932         9350 :       CALL section_add_keyword(subsection, keyword)
    1933         9350 :       CALL keyword_release(keyword)
    1934              :       CALL keyword_create(keyword, __LOCATION__, name="FP", &
    1935              :                           description="Defines which version to use "// &
    1936              :                           "0: f_P^(0), 1: f_P^(1)", &
    1937              :                           usage="FP {integer}", type_of_var=integer_t, &
    1938         9350 :                           n_var=1, default_i_val=1)
    1939         9350 :       CALL section_add_keyword(subsection, keyword)
    1940         9350 :       CALL keyword_release(keyword)
    1941              :       CALL keyword_create(keyword, __LOCATION__, name="TAUCUT", &
    1942              :                           description="Inverse of cutoff freq. for the centroid mode", &
    1943              :                           usage="TAUCUT {real}", type_of_var=real_t, &
    1944         9350 :                           unit_str="fs", n_var=1, default_r_val=0.5_dp)
    1945         9350 :       CALL section_add_keyword(subsection, keyword)
    1946         9350 :       CALL keyword_release(keyword)
    1947              :       CALL keyword_create(keyword, __LOCATION__, name="LAMBCUT", &
    1948              :                           description="Scaling of cutoff freq. to ring polymer NM freq.", &
    1949              :                           usage="LAMBCUT {real}", type_of_var=real_t, &
    1950         9350 :                           n_var=1, default_r_val=2.0_dp)
    1951         9350 :       CALL section_add_keyword(subsection, keyword)
    1952         9350 :       CALL keyword_release(keyword)
    1953              :       CALL keyword_create(keyword, __LOCATION__, name="NF", &
    1954              :                           description="Number of points used for the convolution product.", &
    1955              :                           usage="NF {integer}", type_of_var=integer_t, &
    1956         9350 :                           n_var=1, default_i_val=128)
    1957         9350 :       CALL section_add_keyword(subsection, keyword)
    1958         9350 :       CALL keyword_release(keyword)
    1959              :       CALL keyword_create(keyword, __LOCATION__, name="THERMOSTAT_ENERGY", &
    1960              :                           description="Thermostat energy for conserved quantity. "// &
    1961              :                           "Only useful in restart files.", &
    1962              :                           usage="THERMOSTAT_ENERGY {real}", type_of_var=real_t, &
    1963         9350 :                           n_var=1, default_r_val=0.0_dp)
    1964         9350 :       CALL section_add_keyword(subsection, keyword)
    1965         9350 :       CALL keyword_release(keyword)
    1966         9350 :       CALL section_add_subsection(section, subsection)
    1967         9350 :       CALL section_release(subsection)
    1968              : 
    1969              :       CALL section_create(subsection, __LOCATION__, name="INIT", &
    1970              :                           description="Controls the initialization if the beads are not present", &
    1971         9350 :                           repeats=.FALSE.)
    1972              : 
    1973              :       CALL keyword_create(keyword, __LOCATION__, name="LEVY_POS_SAMPLE", &
    1974              :                           description="Sample bead positions assuming free particle "// &
    1975              :                           "behavior (performs a Levy random walk of length P around "// &
    1976              :                           "the classical position of each atom at the physical "// &
    1977              :                           "temperature defined in PINT%TEMP)", &
    1978              :                           repeats=.FALSE., default_l_val=.FALSE., &
    1979         9350 :                           lone_keyword_l_val=.TRUE.)
    1980         9350 :       CALL section_add_keyword(subsection, keyword)
    1981         9350 :       CALL keyword_release(keyword)
    1982              :       CALL keyword_create(keyword, __LOCATION__, name="LEVY_CORRELATED", &
    1983              :                           description="Use the same Levy path for all atoms, though "// &
    1984              :                           "with mass-dependent variances (might help at very low T)", &
    1985              :                           repeats=.FALSE., default_l_val=.FALSE., &
    1986         9350 :                           lone_keyword_l_val=.TRUE.)
    1987         9350 :       CALL section_add_keyword(subsection, keyword)
    1988         9350 :       CALL keyword_release(keyword)
    1989              :       CALL keyword_create(keyword, __LOCATION__, name="LEVY_TEMP_FACTOR", &
    1990              :                           description="Multiplicative correction factor for the "// &
    1991              :                           "temperature at which the Levy walk is performed "// &
    1992              :                           "(correction is due to the interactions that modify "// &
    1993              :                           "the spread of a free particle)", &
    1994         9350 :                           repeats=.FALSE., default_r_val=1.0_dp)
    1995         9350 :       CALL section_add_keyword(subsection, keyword)
    1996         9350 :       CALL keyword_release(keyword)
    1997              :       CALL keyword_create(keyword, __LOCATION__, name="LEVY_SEED", &
    1998              :                           description="Initial seed for the (pseudo)random number "// &
    1999              :                           "generator that controls Levy walk for bead positions.", &
    2000              :                           usage="LEVY_SEED <INTEGER>", default_i_val=1234, &
    2001         9350 :                           repeats=.FALSE.)
    2002         9350 :       CALL section_add_keyword(subsection, keyword)
    2003         9350 :       CALL keyword_release(keyword)
    2004              :       CALL keyword_create(keyword, __LOCATION__, name="THERMOSTAT_SEED", &
    2005              :                           description="Initial seed for the (pseudo)random number "// &
    2006              :                           "generator that controls the PILE and PIGLET thermostats.", &
    2007              :                           usage="THERMOSTAT_SEED <INTEGER>", default_i_val=12345, &
    2008         9350 :                           repeats=.FALSE.)
    2009         9350 :       CALL section_add_keyword(subsection, keyword)
    2010         9350 :       CALL keyword_release(keyword)
    2011              :       CALL keyword_create(keyword, __LOCATION__, name="RANDOMIZE_POS", &
    2012              :                           description="add gaussian noise to the positions of the beads", &
    2013         9350 :                           repeats=.FALSE., default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2014         9350 :       CALL section_add_keyword(subsection, keyword)
    2015         9350 :       CALL keyword_release(keyword)
    2016              : 
    2017              :       CALL keyword_create(keyword, __LOCATION__, name="CENTROID_SPEED", &
    2018              :                           description="adds random velocity component to the centroid modes "// &
    2019              :                           "(useful to correct for the averaging out of the speed of various beads)", &
    2020         9350 :                           repeats=.FALSE., default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2021         9350 :       CALL section_add_keyword(subsection, keyword)
    2022         9350 :       CALL keyword_release(keyword)
    2023              : 
    2024              :       CALL keyword_create(keyword, __LOCATION__, name="VELOCITY_QUENCH", &
    2025              :                           description="set the initial velocities to zero", &
    2026         9350 :                           repeats=.FALSE., default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2027         9350 :       CALL section_add_keyword(subsection, keyword)
    2028         9350 :       CALL keyword_release(keyword)
    2029              :       CALL keyword_create(keyword, __LOCATION__, name="VELOCITY_SCALE", &
    2030              :                           description="scale initial velocities to the temperature given in MOTION%PINT%TEMP", &
    2031         9350 :                           repeats=.FALSE., default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2032         9350 :       CALL section_add_keyword(subsection, keyword)
    2033         9350 :       CALL keyword_release(keyword)
    2034              : 
    2035         9350 :       CALL section_add_subsection(section, subsection)
    2036         9350 :       CALL section_release(subsection)
    2037              : 
    2038         9350 :       CALL create_helium_section(subsection)
    2039         9350 :       CALL section_add_subsection(section, subsection)
    2040         9350 :       CALL section_release(subsection)
    2041              : 
    2042              :       CALL section_create(subsection, __LOCATION__, name="PRINT", &
    2043              :                           description="Controls the path integral-specific output", &
    2044         9350 :                           n_keywords=2, n_subsections=0, repeats=.FALSE.)
    2045              : 
    2046         9350 :       NULLIFY (print_key)
    2047              : 
    2048              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ENERGY", &
    2049              :                                        description="Controls the output of the path integral energies", &
    2050         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2051         9350 :       CALL section_add_subsection(subsection, print_key)
    2052         9350 :       CALL section_release(print_key)
    2053              : 
    2054              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ACTION", &
    2055              :                                        description="Controls the output of the path integral action", &
    2056         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2057         9350 :       CALL section_add_subsection(subsection, print_key)
    2058         9350 :       CALL section_release(print_key)
    2059              : 
    2060              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "CENTROID_POS", &
    2061              :                                        description="Controls the output of the centroid's position", &
    2062              :                                        unit_str="angstrom", &
    2063         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2064              :       CALL add_format_keyword(keyword, print_key, pos=.TRUE., &
    2065         9350 :                               description="Output file format for the positions of centroid")
    2066         9350 :       CALL section_add_subsection(subsection, print_key)
    2067         9350 :       CALL section_release(print_key)
    2068              : 
    2069              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "CENTROID_VEL", &
    2070              :                                        description="Controls the output of the centroid's velocity", &
    2071              :                                        unit_str="bohr*au_t^-1", &
    2072         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2073              :       CALL add_format_keyword(keyword, print_key, pos=.FALSE., &
    2074         9350 :                               description="Output file format for the velocity of centroid")
    2075         9350 :       CALL section_add_subsection(subsection, print_key)
    2076         9350 :       CALL section_release(print_key)
    2077              : 
    2078              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "CENTROID_GYR", &
    2079              :                                        description="Controls the output of the centroid's radii of gyration", &
    2080              :                                        unit_str="angstrom", &
    2081         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2082         9350 :       CALL section_add_subsection(subsection, print_key)
    2083         9350 :       CALL section_release(print_key)
    2084              : 
    2085              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "COM", &
    2086              :                                        description="Controls the output of the center of mass", &
    2087         9350 :                                        print_level=high_print_level, common_iter_levels=1)
    2088         9350 :       CALL section_add_subsection(subsection, print_key)
    2089         9350 :       CALL section_release(print_key)
    2090              : 
    2091              :       CALL keyword_create(keyword, __LOCATION__, name="IMAGINARY_TIME_STRIDE", &
    2092              :                           description="Prints only every nth bead trajectory", &
    2093         9350 :                           repeats=.FALSE., default_i_val=1)
    2094         9350 :       CALL section_add_keyword(subsection, keyword)
    2095         9350 :       CALL keyword_release(keyword)
    2096              : 
    2097         9350 :       CALL section_add_subsection(section, subsection)
    2098         9350 :       CALL section_release(subsection)
    2099              : 
    2100         9350 :    END SUBROUTINE create_pint_section
    2101              : 
    2102              :    ! ***************************************************************************
    2103              :    !> \brief  Create the input section for superfluid helium solvent.
    2104              :    !> \author Lukasz Walewski
    2105              :    ! ***************************************************************************
    2106              : ! **************************************************************************************************
    2107              : !> \brief ...
    2108              : !> \param section ...
    2109              : ! **************************************************************************************************
    2110         9350 :    SUBROUTINE create_helium_section(section)
    2111              :       TYPE(section_type), POINTER                        :: section
    2112              : 
    2113              :       TYPE(keyword_type), POINTER                        :: keyword
    2114              :       TYPE(section_type), POINTER                        :: print_key, subsection, subsubsection
    2115              : 
    2116         9350 :       CPASSERT(.NOT. ASSOCIATED(section))
    2117              : 
    2118              :       CALL section_create(section, __LOCATION__, name="HELIUM", &
    2119              :                           description="The section that controls optional helium solvent"// &
    2120              :                           " environment (highly experimental, not for general use yet)", &
    2121         9350 :                           n_keywords=31, n_subsections=11, repeats=.FALSE.)
    2122              : 
    2123         9350 :       NULLIFY (keyword)
    2124              :       CALL keyword_create(keyword, __LOCATION__, name="_SECTION_PARAMETERS_", &
    2125              :                           description="Whether or not to actually use this section", &
    2126         9350 :                           usage="silent", default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2127         9350 :       CALL section_add_keyword(section, keyword)
    2128         9350 :       CALL keyword_release(keyword)
    2129              : 
    2130              :       CALL keyword_create(keyword, __LOCATION__, name="HELIUM_ONLY", &
    2131              :                           description="Simulate helium solvent only, "// &
    2132              :                           "disregard solute entirely", &
    2133              :                           repeats=.FALSE., default_l_val=.FALSE., &
    2134         9350 :                           lone_keyword_l_val=.TRUE.)
    2135         9350 :       CALL section_add_keyword(section, keyword)
    2136         9350 :       CALL keyword_release(keyword)
    2137              : 
    2138              :       CALL keyword_create(keyword, __LOCATION__, name="INTERACTION_POT_SCAN", &
    2139              :                           description="Scan solute-helium interaction potential, "// &
    2140              :                           "cubefile parameters set in subsection RHO", &
    2141              :                           repeats=.FALSE., default_l_val=.FALSE., &
    2142         9350 :                           lone_keyword_l_val=.TRUE.)
    2143         9350 :       CALL section_add_keyword(section, keyword)
    2144         9350 :       CALL keyword_release(keyword)
    2145              : 
    2146              :       CALL keyword_create(keyword, __LOCATION__, name="NUM_ENV", &
    2147              :                           description="Number of independent helium environments", &
    2148         9350 :                           repeats=.FALSE., default_i_val=1)
    2149         9350 :       CALL section_add_keyword(section, keyword)
    2150         9350 :       CALL keyword_release(keyword)
    2151              : 
    2152              :       CALL keyword_create(keyword, __LOCATION__, name="POTENTIAL_FILE_NAME", &
    2153              :                           description="Name of the Helium interaction potential file", &
    2154         9350 :                           repeats=.FALSE., default_lc_val="HELIUM.POT")
    2155         9350 :       CALL section_add_keyword(section, keyword)
    2156         9350 :       CALL keyword_release(keyword)
    2157              : 
    2158              :       CALL keyword_create(keyword, __LOCATION__, name="GET_FORCES", &
    2159              :                           description="Get average MC forces or last MC forces to propagate MD", &
    2160              :                           usage="GET_FORCES (AVERAGE|LAST)", &
    2161              :                           default_i_val=helium_forces_average, &
    2162              :                           enum_c_vals=s2a("AVERAGE", "LAST"), &
    2163         9350 :                           enum_i_vals=[helium_forces_average, helium_forces_last])
    2164         9350 :       CALL section_add_keyword(section, keyword)
    2165         9350 :       CALL keyword_release(keyword)
    2166              : 
    2167              :       CALL keyword_create(keyword, __LOCATION__, name="SOLUTE_INTERACTION", &
    2168              :                           description="Interaction potential between helium and the solute", &
    2169              :                           usage="SOLUTE_INTERACTION (NONE | MWATER | NNP)", &
    2170              :                           default_i_val=helium_solute_intpot_none, &
    2171              :                           enum_c_vals=s2a("NONE", "MWATER", "NNP"), &
    2172              :                           enum_i_vals=[ &
    2173              :                           helium_solute_intpot_none, &
    2174              :                           helium_solute_intpot_mwater, &
    2175              :                           helium_solute_intpot_nnp], &
    2176              :                           enum_desc=s2a( &
    2177              :                           "No interaction with solute", &
    2178              :                           "Test interaction with wrong Water", &
    2179         9350 :                           "Interaction with NNP"))
    2180         9350 :       CALL section_add_keyword(section, keyword)
    2181         9350 :       CALL keyword_release(keyword)
    2182              : 
    2183              :       CALL keyword_create(keyword, __LOCATION__, name="NATOMS", &
    2184              :                           description="Number of helium atoms", &
    2185         9350 :                           repeats=.FALSE., default_i_val=64)
    2186         9350 :       CALL section_add_keyword(section, keyword)
    2187         9350 :       CALL keyword_release(keyword)
    2188              : 
    2189              :       CALL keyword_create(keyword, __LOCATION__, name="NBEADS", &
    2190              :                           description="Number of helium path integral beads", &
    2191         9350 :                           repeats=.FALSE., default_i_val=25)
    2192         9350 :       CALL section_add_keyword(section, keyword)
    2193         9350 :       CALL keyword_release(keyword)
    2194              : 
    2195              :       CALL keyword_create(keyword, __LOCATION__, name="RNG_SEED", &
    2196              :                           description="Initial seed for the (pseudo)random number "// &
    2197              :                           "generator that controls helium coordinate generation and propagation.", &
    2198              :                           usage="RNG_SEED <INTEGER>", default_i_val=12345, &
    2199         9350 :                           repeats=.FALSE.)
    2200         9350 :       CALL section_add_keyword(section, keyword)
    2201         9350 :       CALL keyword_release(keyword)
    2202              : 
    2203              :       CALL keyword_create(keyword, __LOCATION__, name="N_INNER", &
    2204              :                           variants=s2a("INOROT"), &
    2205              :                           description="Number of MC iterations at the same time slice(s) "// &
    2206              :                           "(number of inner MC loop iterations)", &
    2207         9350 :                           repeats=.FALSE., default_i_val=6600)
    2208         9350 :       CALL section_add_keyword(section, keyword)
    2209         9350 :       CALL keyword_release(keyword)
    2210              : 
    2211              :       CALL keyword_create(keyword, __LOCATION__, name="N_OUTER", &
    2212              :                           variants=s2a("IROT"), &
    2213              :                           description="how often to reselect the time slice(s) to work on "// &
    2214              :                           "(number of outer MC loop iterations)", &
    2215         9350 :                           repeats=.FALSE., default_i_val=300)
    2216         9350 :       CALL section_add_keyword(section, keyword)
    2217         9350 :       CALL keyword_release(keyword)
    2218              : 
    2219              :       CALL keyword_create(keyword, __LOCATION__, name="SAMPLING_METHOD", &
    2220              :                           description="Choose between Ceperley or the worm algorithm", &
    2221              :                           usage="SAMPLING_METHOD (CEPERLEY|WORM)", &
    2222              :                           default_i_val=helium_sampling_ceperley, &
    2223              :                           enum_c_vals=s2a("CEPERLEY", "WORM"), &
    2224         9350 :                           enum_i_vals=[helium_sampling_ceperley, helium_sampling_worm])
    2225         9350 :       CALL section_add_keyword(section, keyword)
    2226         9350 :       CALL keyword_release(keyword)
    2227              : 
    2228              :       CALL keyword_create(keyword, __LOCATION__, name="COORD_INIT_TEMP", &
    2229              :                           description="Temperature for thermal gaussian initialization of the helium."// &
    2230              :                           " Negative values correspond to a hot start.", &
    2231              :                           default_r_val=cp_unit_to_cp2k(300._dp, "K"), &
    2232         9350 :                           unit_str="K")
    2233         9350 :       CALL section_add_keyword(section, keyword)
    2234         9350 :       CALL keyword_release(keyword)
    2235              : 
    2236              :       CALL keyword_create(keyword, __LOCATION__, name="SOLUTE_RADIUS", &
    2237              :                           description="Radius of the solute molecule for prevention of"// &
    2238              :                           " coordinate collision during initialization", &
    2239              :                           default_r_val=cp_unit_to_cp2k(0.0_dp, "angstrom"), &
    2240         9350 :                           repeats=.FALSE., type_of_var=real_t, unit_str="angstrom")
    2241         9350 :       CALL section_add_keyword(section, keyword)
    2242         9350 :       CALL keyword_release(keyword)
    2243              : 
    2244              :       ! Helium-solute interaction NNP
    2245         9350 :       NULLIFY (subsection)
    2246              :       CALL section_create(subsection, __LOCATION__, name="NNP", &
    2247              :                           description="This section contains all information to run an helium-solute "// &
    2248              :                           "interaction Neural Network Potential (NNP) calculation.", &
    2249         9350 :                           n_keywords=2, n_subsections=3, repeats=.FALSE.)
    2250              : 
    2251              :       CALL keyword_create(keyword, __LOCATION__, name="NNP_INPUT_FILE_NAME", &
    2252              :                           description="File containing the input information for the setup "// &
    2253              :                           "of the NNP (n2p2/RuNNer format). ", &
    2254         9350 :                           repeats=.FALSE., default_lc_val="input.nn")
    2255         9350 :       CALL section_add_keyword(subsection, keyword)
    2256         9350 :       CALL keyword_release(keyword)
    2257              : 
    2258              :       CALL keyword_create(keyword, __LOCATION__, name="SCALE_FILE_NAME", &
    2259              :                           description="File containing the scaling information for the symmetry "// &
    2260              :                           "functions of the NNP. ", &
    2261         9350 :                           repeats=.FALSE., default_lc_val="scaling.data")
    2262         9350 :       CALL section_add_keyword(subsection, keyword)
    2263         9350 :       CALL keyword_release(keyword)
    2264              : 
    2265         9350 :       NULLIFY (subsubsection)
    2266              :       CALL section_create(subsubsection, __LOCATION__, name="SR_CUTOFF", &
    2267              :                           description="Section for failsafe short range cutoffs for the NNPs, "// &
    2268              :                           "if the distance between solvent and specified solute element becomes "// &
    2269              :                           "smaller than the given cutoff, an artifical repulsive potential is "// &
    2270              :                           "introduced. Note this is only meant to prevent such configurations, "// &
    2271              :                           "not to physically sample them.", &
    2272         9350 :                           n_keywords=2, n_subsections=0, repeats=.TRUE.)
    2273              : 
    2274              :       CALL keyword_create(keyword, __LOCATION__, name="ELEMENT", &
    2275              :                           description="Solute element for which the short range cutoff is in effect", &
    2276         9350 :                           repeats=.FALSE., default_c_val="none")
    2277         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2278         9350 :       CALL keyword_release(keyword)
    2279              : 
    2280              :       CALL keyword_create(keyword, __LOCATION__, name="RADIUS", &
    2281              :                           description="Short range cutoff in Angstrom, below this cutoff, the energy "// &
    2282              :                           "is replaced by a sizable positive value plus a 1/r**2 term to guide particles "// &
    2283              :                           "away from each other.", &
    2284              :                           default_r_val=cp_unit_to_cp2k(0.0_dp, "angstrom"), &
    2285         9350 :                           repeats=.FALSE., type_of_var=real_t, unit_str="angstrom")
    2286         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2287         9350 :       CALL keyword_release(keyword)
    2288         9350 :       CALL section_add_subsection(subsection, subsubsection)
    2289         9350 :       CALL section_release(subsubsection)
    2290              : 
    2291         9350 :       NULLIFY (subsubsection)
    2292              :       CALL section_create(subsubsection, __LOCATION__, name="MODEL", &
    2293              :                           description="Section for a single NNP model. If this section is repeated, "// &
    2294              :                           "a committee model (C-NNP)is used where the NNP members share the same "// &
    2295              :                           "symmetry functions. ", &
    2296         9350 :                           n_keywords=1, n_subsections=0, repeats=.TRUE.)
    2297              : 
    2298              :       CALL keyword_create(keyword, __LOCATION__, name="WEIGHTS", &
    2299              :                           description="File containing the weights for the artificial neural "// &
    2300              :                           "networks of the NNP. The specified name is extended by .XXX.data ", &
    2301         9350 :                           repeats=.FALSE., default_lc_val="weights")
    2302         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2303         9350 :       CALL keyword_release(keyword)
    2304         9350 :       CALL section_add_subsection(subsection, subsubsection)
    2305         9350 :       CALL section_release(subsubsection)
    2306              : 
    2307              :       ! Create the PRINT subsection
    2308         9350 :       NULLIFY (subsubsection)
    2309              :       CALL section_create(subsubsection, __LOCATION__, name="PRINT", &
    2310              :                           description="Section of possible print options in NNP code.", &
    2311         9350 :                           n_keywords=0, n_subsections=3, repeats=.FALSE.)
    2312         9350 :       NULLIFY (print_key, keyword)
    2313              : 
    2314              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ENERGIES", &
    2315              :                                        description="Controls the printing of the NNP energies.", &
    2316         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2317         9350 :       CALL section_add_subsection(subsubsection, print_key)
    2318         9350 :       CALL section_release(print_key)
    2319              : 
    2320              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "FORCES_SIGMA", &
    2321              :                                        description="Controls the printing of the STD per atom of the NNP forces.", &
    2322         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2323         9350 :       CALL section_add_subsection(subsubsection, print_key)
    2324         9350 :       CALL section_release(print_key)
    2325              : 
    2326              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "EXTRAPOLATION", &
    2327              :                                        description="If activated, output structures with extrapolation "// &
    2328              :                                        "warning in xyz-format", &
    2329         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2330         9350 :       CALL section_add_subsection(subsubsection, print_key)
    2331         9350 :       CALL section_release(print_key)
    2332         9350 :       CALL section_add_subsection(subsection, subsubsection)
    2333         9350 :       CALL section_release(subsubsection)
    2334              : 
    2335         9350 :       CALL section_add_subsection(section, subsection)
    2336         9350 :       CALL section_release(subsection) ! release NNP subsection
    2337              : 
    2338              :       ! Ceperley's sampling algorithm
    2339         9350 :       NULLIFY (subsection)
    2340              :       CALL section_create(subsection, __LOCATION__, name="CEPERLEY", &
    2341              :                           description="Enables sampling with Ceperley's algorithm", &
    2342         9350 :                           n_keywords=2, n_subsections=1, repeats=.FALSE.)
    2343              : 
    2344              :       CALL keyword_create(keyword, __LOCATION__, name="BISECTION", &
    2345              :                           description="how many time slices to change at once (+1). "// &
    2346              :                           "Must be a power of 2 currently", &
    2347         9350 :                           repeats=.FALSE., default_i_val=8)
    2348         9350 :       CALL section_add_keyword(subsection, keyword)
    2349         9350 :       CALL keyword_release(keyword)
    2350              : 
    2351              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_PERM_CYCLE", &
    2352              :                           description="how large cyclic permutations to try", &
    2353         9350 :                           repeats=.FALSE., default_i_val=6)
    2354         9350 :       CALL section_add_keyword(subsection, keyword)
    2355         9350 :       CALL keyword_release(keyword)
    2356              : 
    2357         9350 :       NULLIFY (subsubsection)
    2358              :       CALL section_create(subsubsection, __LOCATION__, name="M-SAMPLING", &
    2359              :                           description="Permutation cycle length sampling settings", &
    2360         9350 :                           n_keywords=3, n_subsections=0, repeats=.FALSE.)
    2361              :       CALL keyword_create(keyword, __LOCATION__, name="DISTRIBUTION-TYPE", &
    2362              :                           description="Distribution from which the cycle length m is sampled", &
    2363              :                           usage="DISTRIBUTION-TYPE (SINGLEV|UNIFORM|LINEAR|QUADRATIC|EXPONENTIAL|GAUSSIAN)", &
    2364              :                           default_i_val=helium_mdist_uniform, &
    2365              :                           enum_c_vals=s2a( &
    2366              :                           "SINGLEV", &
    2367              :                           "UNIFORM", &
    2368              :                           "LINEAR", &
    2369              :                           "QUADRATIC", &
    2370              :                           "EXPONENTIAL", &
    2371              :                           "GAUSSIAN"), &
    2372              :                           enum_i_vals=[ &
    2373              :                           helium_mdist_singlev, &
    2374              :                           helium_mdist_uniform, &
    2375              :                           helium_mdist_linear, &
    2376              :                           helium_mdist_quadratic, &
    2377              :                           helium_mdist_exponential, &
    2378         9350 :                           helium_mdist_gaussian])
    2379         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2380         9350 :       CALL keyword_release(keyword)
    2381              :       CALL keyword_create(keyword, __LOCATION__, name="M-VALUE", &
    2382              :                           description="Value of m treated in a special way "// &
    2383              :                           "(specific behavior depends on the distribution type chosen)", &
    2384              :                           repeats=.FALSE., &
    2385         9350 :                           default_i_val=1)
    2386         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2387         9350 :       CALL keyword_release(keyword)
    2388              :       CALL keyword_create(keyword, __LOCATION__, name="M-RATIO", &
    2389              :                           description="Probability ratio betw M-VALUE and other cycle lengths", &
    2390              :                           repeats=.FALSE., &
    2391         9350 :                           default_r_val=1.0_dp)
    2392         9350 :       CALL section_add_keyword(subsubsection, keyword)
    2393         9350 :       CALL keyword_release(keyword)
    2394         9350 :       CALL section_add_subsection(subsection, subsubsection)
    2395         9350 :       CALL section_release(subsubsection)
    2396         9350 :       CALL section_add_subsection(section, subsection)
    2397         9350 :       CALL section_release(subsection) ! release CEPERLEY subsection
    2398              : 
    2399              : ! worm algorithm parameters:
    2400         9350 :       NULLIFY (subsection)
    2401              :       CALL section_create(subsection, __LOCATION__, name="WORM", &
    2402              :                           description="Enables sampling via the canonical worm algorithm adapted from Bonisegni", &
    2403         9350 :                           n_keywords=12, n_subsections=0, repeats=.FALSE.)
    2404              : 
    2405              :       CALL keyword_create(keyword, __LOCATION__, name="CENTROID_DRMAX", &
    2406              :                           description="Maximum displacement allowed for the centroid moves", &
    2407         9350 :                           repeats=.FALSE., default_r_val=0.5_dp)
    2408         9350 :       CALL section_add_keyword(subsection, keyword)
    2409         9350 :       CALL keyword_release(keyword)
    2410              : 
    2411              :       CALL keyword_create(keyword, __LOCATION__, name="STAGING_L", &
    2412              :                           description="From 2 up to max. L-1 beads will be moved", &
    2413         9350 :                           repeats=.FALSE., default_i_val=5)
    2414         9350 :       CALL section_add_keyword(subsection, keyword)
    2415         9350 :       CALL keyword_release(keyword)
    2416              : 
    2417              :       CALL keyword_create(keyword, __LOCATION__, name="OPEN_CLOSE_SCALE", &
    2418              :                           description="Open/Close acceptance adjustment parameter", &
    2419         9350 :                           repeats=.FALSE., default_r_val=0.01_dp)
    2420         9350 :       CALL section_add_keyword(subsection, keyword)
    2421         9350 :       CALL keyword_release(keyword)
    2422              : 
    2423              :       CALL keyword_create(keyword, __LOCATION__, name="ALLOW_OPEN", &
    2424              :                           description="Enable bosonic exchange sampling", &
    2425         9350 :                           repeats=.FALSE., default_l_val=.TRUE.)
    2426         9350 :       CALL section_add_keyword(subsection, keyword)
    2427         9350 :       CALL keyword_release(keyword)
    2428              : 
    2429              :       CALL keyword_create(keyword, __LOCATION__, name="MAX_OPEN_CYCLES", &
    2430              :                          description="If > 0 then reset positions and permutations to the previous closed &
    2431              :                          & state if staying more than this amount of MC cycles in open state to avoid staying &
    2432              :                          & trapped in open state for too long. Use with caution as it can potentially introduce &
    2433              :                          & a bias in the sampling.", &
    2434         9350 :                           repeats=.FALSE., default_i_val=0)
    2435         9350 :       CALL section_add_keyword(subsection, keyword)
    2436         9350 :       CALL keyword_release(keyword)
    2437              : 
    2438              :       CALL keyword_create(keyword, __LOCATION__, name="SHOW_STATISTICS", &
    2439              :                           description="Show sampling statistics in output", &
    2440         9350 :                           repeats=.FALSE., default_l_val=.TRUE.)
    2441         9350 :       CALL section_add_keyword(subsection, keyword)
    2442         9350 :       CALL keyword_release(keyword)
    2443              : 
    2444              :       CALL keyword_create(keyword, __LOCATION__, name="CENTROID_WEIGHT", &
    2445              :                           description="Absolute weight of the centroid move", &
    2446         9350 :                           repeats=.FALSE., default_i_val=10)
    2447         9350 :       CALL section_add_keyword(subsection, keyword)
    2448         9350 :       CALL keyword_release(keyword)
    2449              : 
    2450              :       CALL keyword_create(keyword, __LOCATION__, name="STAGING_WEIGHT", &
    2451              :                           description="Absolute weight of the staging move", &
    2452         9350 :                           repeats=.FALSE., default_i_val=30)
    2453         9350 :       CALL section_add_keyword(subsection, keyword)
    2454         9350 :       CALL keyword_release(keyword)
    2455              : 
    2456              :       CALL keyword_create(keyword, __LOCATION__, name="OPEN_CLOSE_WEIGHT", &
    2457              :                           description="Absolute weight of the open/close move", &
    2458         9350 :                           repeats=.FALSE., default_i_val=10)
    2459         9350 :       CALL section_add_keyword(subsection, keyword)
    2460         9350 :       CALL keyword_release(keyword)
    2461              : 
    2462              :       CALL keyword_create(keyword, __LOCATION__, name="HEAD_TAIL_WEIGHT", &
    2463              :                           description="Absolute weight of the head/tail moves (both)", &
    2464         9350 :                           repeats=.FALSE., default_i_val=10)
    2465         9350 :       CALL section_add_keyword(subsection, keyword)
    2466         9350 :       CALL keyword_release(keyword)
    2467              : 
    2468              :       CALL keyword_create(keyword, __LOCATION__, name="CRAWL_WEIGHT", &
    2469              :                           description="Absolute weight of the crawl bwd/fwd moves (both)", &
    2470         9350 :                           repeats=.FALSE., default_i_val=10)
    2471         9350 :       CALL section_add_keyword(subsection, keyword)
    2472         9350 :       CALL keyword_release(keyword)
    2473              : 
    2474              :       CALL keyword_create(keyword, __LOCATION__, name="CRAWL_REPETITION", &
    2475              :                           description="Number of repeated crawl moves", &
    2476         9350 :                           repeats=.FALSE., default_i_val=4)
    2477         9350 :       CALL section_add_keyword(subsection, keyword)
    2478         9350 :       CALL keyword_release(keyword)
    2479              : 
    2480              :       CALL keyword_create(keyword, __LOCATION__, name="SWAP_WEIGHT", &
    2481              :                           description="Absolute weight of the crawl move", &
    2482         9350 :                           repeats=.FALSE., default_i_val=10)
    2483         9350 :       CALL section_add_keyword(subsection, keyword)
    2484         9350 :       CALL keyword_release(keyword)
    2485              : 
    2486         9350 :       CALL section_add_subsection(section, subsection)
    2487         9350 :       CALL section_release(subsection) ! release WORM subsection
    2488              : 
    2489              : ! end of worm parameters
    2490              : 
    2491              :       CALL keyword_create(keyword, __LOCATION__, name="PERIODIC", &
    2492              :                           description="Use periodic boundary conditions for helium", &
    2493         9350 :                           repeats=.FALSE., default_l_val=.FALSE.)
    2494         9350 :       CALL section_add_keyword(section, keyword)
    2495         9350 :       CALL keyword_release(keyword)
    2496              : 
    2497              :       CALL keyword_create(keyword, __LOCATION__, name="CELL_SIZE", &
    2498              :                           description="PBC unit cell size (NOTE 1: density, number of atoms"// &
    2499              :                           " and volume are interdependent - give only two of them; "// &
    2500              :                           "NOTE 2: for small cell sizes specify NATOMS instead)", &
    2501         9350 :                           repeats=.FALSE., type_of_var=real_t, unit_str="angstrom")
    2502         9350 :       CALL section_add_keyword(section, keyword)
    2503         9350 :       CALL keyword_release(keyword)
    2504              : 
    2505              :       CALL keyword_create(keyword, __LOCATION__, name="CELL_SHAPE", &
    2506              :                           description="PBC unit cell shape for helium", &
    2507              :                           usage="CELL_SHAPE (CUBE|OCTAHEDRON)", &
    2508              :                           default_i_val=helium_cell_shape_cube, &
    2509              :                           enum_c_vals=s2a("CUBE", "OCTAHEDRON"), &
    2510         9350 :                           enum_i_vals=[helium_cell_shape_cube, helium_cell_shape_octahedron])
    2511         9350 :       CALL section_add_keyword(section, keyword)
    2512         9350 :       CALL keyword_release(keyword)
    2513              : 
    2514              :       CALL keyword_create(keyword, __LOCATION__, name="DROPLET_RADIUS", &
    2515              :                           description="Reject a move if any of the new positions does not lie within"// &
    2516              :                           "  this range from the center of gravity", &
    2517              :                           repeats=.FALSE., type_of_var=real_t, default_r_val=HUGE(1.0_dp), &
    2518         9350 :                           unit_str="angstrom")
    2519         9350 :       CALL section_add_keyword(section, keyword)
    2520         9350 :       CALL keyword_release(keyword)
    2521              : 
    2522              :       CALL keyword_create(keyword, __LOCATION__, name="DENSITY", &
    2523              :                           description="trial density of helium for determining the helium "// &
    2524              :                           "box size", &
    2525              :                           repeats=.FALSE., &
    2526              :                           default_r_val=cp_unit_to_cp2k(0.02186_dp, "angstrom^-3"), &
    2527         9350 :                           unit_str="angstrom^-3")
    2528         9350 :       CALL section_add_keyword(section, keyword)
    2529         9350 :       CALL keyword_release(keyword)
    2530              : 
    2531              :       CALL keyword_create(keyword, __LOCATION__, name="PRESAMPLE", &
    2532              :                           description="Presample He coordinates before first PIMD step", &
    2533         9350 :                           repeats=.FALSE., default_l_val=.FALSE.)
    2534         9350 :       CALL section_add_keyword(section, keyword)
    2535         9350 :       CALL keyword_release(keyword)
    2536              : 
    2537              :       CALL section_create(subsection, __LOCATION__, name="RDF", &
    2538              :                           description="Radial distribution settings", &
    2539         9350 :                           n_keywords=5, n_subsections=0, repeats=.FALSE.)
    2540              : 
    2541              :       CALL keyword_create(keyword, __LOCATION__, name="_SECTION_PARAMETERS_", &
    2542              :                           description="Whether or not to actually calculate this property", &
    2543         9350 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2544         9350 :       CALL section_add_keyword(subsection, keyword)
    2545         9350 :       CALL keyword_release(keyword)
    2546              : 
    2547              :       CALL keyword_create(keyword, __LOCATION__, name="MAXR", &
    2548              :                           description="Maximum RDF range, defaults to unit cell size", &
    2549              :                           repeats=.FALSE., type_of_var=real_t, &
    2550         9350 :                           unit_str="angstrom")
    2551         9350 :       CALL section_add_keyword(subsection, keyword)
    2552         9350 :       CALL keyword_release(keyword)
    2553              : 
    2554              :       CALL keyword_create(keyword, __LOCATION__, name="NBIN", &
    2555              :                           description="Number of bins", &
    2556              :                           repeats=.FALSE., &
    2557         9350 :                           default_i_val=250)
    2558         9350 :       CALL section_add_keyword(subsection, keyword)
    2559         9350 :       CALL keyword_release(keyword)
    2560              : 
    2561              :       CALL keyword_create(keyword, __LOCATION__, name="SOLUTE_HE", &
    2562              :                           description="Whether or not to calculate solute-He RDFs (if solute is present)", &
    2563         9350 :                           default_l_val=.TRUE., lone_keyword_l_val=.TRUE.)
    2564         9350 :       CALL section_add_keyword(subsection, keyword)
    2565         9350 :       CALL keyword_release(keyword)
    2566              : 
    2567              :       CALL keyword_create(keyword, __LOCATION__, name="HE_HE", &
    2568              :                           description="Whether or not to calculate He-He RDFs", &
    2569         9350 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2570         9350 :       CALL section_add_keyword(subsection, keyword)
    2571         9350 :       CALL keyword_release(keyword)
    2572              : 
    2573         9350 :       CALL section_add_subsection(section, subsection)
    2574         9350 :       CALL section_release(subsection)
    2575              : 
    2576         9350 :       NULLIFY (subsection)
    2577              :       CALL section_create(subsection, __LOCATION__, name="RHO", &
    2578              :                           description="Spatial distribution settings", &
    2579         9350 :                           n_keywords=10, n_subsections=0, repeats=.FALSE.)
    2580              :       CALL keyword_create(keyword, __LOCATION__, name="_SECTION_PARAMETERS_", &
    2581              :                           description="Whether or not to actually calculate densities "// &
    2582              :                           "(requires significant amount of memory, depending on the value of NBIN)", &
    2583         9350 :                           default_l_val=.FALSE., lone_keyword_l_val=.TRUE.)
    2584         9350 :       CALL section_add_keyword(subsection, keyword)
    2585         9350 :       CALL keyword_release(keyword)
    2586              :       CALL keyword_create(keyword, __LOCATION__, name="NBIN", &
    2587              :                           description="Number of grid points in each direction for density binning", &
    2588              :                           repeats=.FALSE., &
    2589         9350 :                           default_i_val=100)
    2590         9350 :       CALL section_add_keyword(subsection, keyword)
    2591         9350 :       CALL keyword_release(keyword)
    2592              :       !
    2593              :       CALL keyword_create(keyword, __LOCATION__, name="MIN_CYCLE_LENGTHS_WDG", &
    2594              :                           description="Density of winding paths "// &
    2595              :                           "not shorter than the given length", &
    2596              :                           repeats=.FALSE., usage="MIN_CYCLE_LENGTHS_WDG <INT> <INT> .. <INT>", &
    2597         9350 :                           type_of_var=integer_t, n_var=-1)
    2598         9350 :       CALL section_add_keyword(subsection, keyword)
    2599         9350 :       CALL keyword_release(keyword)
    2600              :       !
    2601              :       CALL keyword_create(keyword, __LOCATION__, name="MIN_CYCLE_LENGTHS_NON", &
    2602              :                           description="Density of non-winding paths "// &
    2603              :                           "not shorter than the given length", &
    2604              :                           repeats=.FALSE., usage="MIN_CYCLE_LENGTHS_NON <INT> <INT> .. <INT>", &
    2605         9350 :                           type_of_var=integer_t, n_var=-1)
    2606         9350 :       CALL section_add_keyword(subsection, keyword)
    2607         9350 :       CALL keyword_release(keyword)
    2608              :       !
    2609              :       CALL keyword_create(keyword, __LOCATION__, name="MIN_CYCLE_LENGTHS_ALL", &
    2610              :                           description="Density of all paths "// &
    2611              :                           "not shorter than the given length", &
    2612              :                           repeats=.FALSE., usage="MIN_CYCLE_LENGTHS_ALL <INT> <INT> .. <INT>", &
    2613         9350 :                           type_of_var=integer_t, n_var=-1)
    2614         9350 :       CALL section_add_keyword(subsection, keyword)
    2615         9350 :       CALL keyword_release(keyword)
    2616              :       !
    2617              :       CALL keyword_create(keyword, __LOCATION__, name="ATOM_NUMBER", &
    2618              :                           description="Atom number density", &
    2619              :                           repeats=.FALSE., &
    2620              :                           type_of_var=logical_t, &
    2621              :                           default_l_val=.TRUE., &
    2622         9350 :                           lone_keyword_l_val=.TRUE.)
    2623         9350 :       CALL section_add_keyword(subsection, keyword)
    2624         9350 :       CALL keyword_release(keyword)
    2625              :       !
    2626              :       CALL keyword_create(keyword, __LOCATION__, name="PROJECTED_AREA_2", &
    2627              :                           description="Projected area squared density, A*A(r)", &
    2628              :                           repeats=.FALSE., &
    2629              :                           type_of_var=logical_t, &
    2630              :                           default_l_val=.FALSE., &
    2631         9350 :                           lone_keyword_l_val=.TRUE.)
    2632         9350 :       CALL section_add_keyword(subsection, keyword)
    2633         9350 :       CALL keyword_release(keyword)
    2634              :       !
    2635              :       CALL keyword_create(keyword, __LOCATION__, name="WINDING_NUMBER_2", &
    2636              :                           description="Winding number squared density, W*W(r)", &
    2637              :                           repeats=.FALSE., &
    2638              :                           type_of_var=logical_t, &
    2639              :                           default_l_val=.FALSE., &
    2640         9350 :                           lone_keyword_l_val=.TRUE.)
    2641         9350 :       CALL section_add_keyword(subsection, keyword)
    2642         9350 :       CALL keyword_release(keyword)
    2643              :       !
    2644              :       CALL keyword_create(keyword, __LOCATION__, name="WINDING_CYCLE_2", &
    2645              :                           description="Winding number squared density, W^2(r)", &
    2646              :                           repeats=.FALSE., &
    2647              :                           type_of_var=logical_t, &
    2648              :                           default_l_val=.FALSE., &
    2649         9350 :                           lone_keyword_l_val=.TRUE.)
    2650         9350 :       CALL section_add_keyword(subsection, keyword)
    2651         9350 :       CALL keyword_release(keyword)
    2652              :       !
    2653              :       CALL keyword_create(keyword, __LOCATION__, name="MOMENT_OF_INERTIA", &
    2654              :                           description="Moment of inertia density", &
    2655              :                           repeats=.FALSE., &
    2656              :                           type_of_var=logical_t, &
    2657              :                           default_l_val=.FALSE., &
    2658         9350 :                           lone_keyword_l_val=.TRUE.)
    2659         9350 :       CALL section_add_keyword(subsection, keyword)
    2660         9350 :       CALL keyword_release(keyword)
    2661              : 
    2662         9350 :       CALL section_add_subsection(section, subsection)
    2663         9350 :       CALL section_release(subsection)
    2664              :       ! end of subsection RHO
    2665              : 
    2666         9350 :       CALL create_coord_section(subsection, "HELIUM")
    2667         9350 :       CALL section_add_subsection(section, subsection)
    2668         9350 :       CALL section_release(subsection)
    2669              : 
    2670              :       CALL section_create(subsection, __LOCATION__, name="PERM", &
    2671              :                           description="Permutation state used for restart", &
    2672         9350 :                           n_keywords=1, n_subsections=0, repeats=.FALSE.)
    2673              :       CALL keyword_create(keyword, __LOCATION__, name="_DEFAULT_KEYWORD_", &
    2674              :                           description="Specify particle index permutation for every "// &
    2675              :                           "helium atom", repeats=.TRUE., usage="<INT> <INT> .. <INT>", &
    2676         9350 :                           type_of_var=integer_t, n_var=-1)
    2677         9350 :       CALL section_add_keyword(subsection, keyword)
    2678         9350 :       CALL keyword_release(keyword)
    2679         9350 :       CALL section_add_subsection(section, subsection)
    2680         9350 :       CALL section_release(subsection)
    2681              : 
    2682              :       CALL section_create(subsection, __LOCATION__, name="AVERAGES", &
    2683              :                           description="Average properties (used for restarts)", &
    2684         9350 :                           n_keywords=7, n_subsections=0, repeats=.FALSE.)
    2685              :       CALL keyword_create(keyword, __LOCATION__, name="PROJECTED_AREA", &
    2686              :                           description="Projected area vector for all environments", &
    2687              :                           repeats=.TRUE., usage="PROJECTED_AREA <REAL> <REAL> .. <REAL>", &
    2688         9350 :                           type_of_var=real_t, n_var=-1)
    2689         9350 :       CALL section_add_keyword(subsection, keyword)
    2690         9350 :       CALL keyword_release(keyword)
    2691              :       CALL keyword_create(keyword, __LOCATION__, name="PROJECTED_AREA_2", &
    2692              :                           description="Projected area vector squared for all environments", &
    2693              :                           repeats=.TRUE., usage="PROJECTED_AREA_2 <REAL> <REAL> .. <REAL>", &
    2694         9350 :                           type_of_var=real_t, n_var=-1)
    2695         9350 :       CALL section_add_keyword(subsection, keyword)
    2696         9350 :       CALL keyword_release(keyword)
    2697              :       CALL keyword_create(keyword, __LOCATION__, name="WINDING_NUMBER_2", &
    2698              :                           description="Winding number vector squared for all environments", &
    2699              :                           repeats=.TRUE., usage="WINDING_NUMBER_2 <REAL> <REAL> .. <REAL>", &
    2700         9350 :                           type_of_var=real_t, n_var=-1)
    2701         9350 :       CALL section_add_keyword(subsection, keyword)
    2702         9350 :       CALL keyword_release(keyword)
    2703              :       CALL keyword_create(keyword, __LOCATION__, name="MOMENT_OF_INERTIA", &
    2704              :                           description="Moment of inertia vector for all environments", &
    2705              :                           repeats=.TRUE., usage="MOMENT_OF_INERTIA <REAL> <REAL> .. <REAL>", &
    2706         9350 :                           type_of_var=real_t, n_var=-1)
    2707         9350 :       CALL section_add_keyword(subsection, keyword)
    2708         9350 :       CALL keyword_release(keyword)
    2709              :       CALL keyword_create(keyword, __LOCATION__, name="RDF", &
    2710              :                           description="Radial distributions averaged over all environments", &
    2711              :                           repeats=.TRUE., usage="RDF <REAL> <REAL> .. <REAL>", &
    2712         9350 :                           type_of_var=real_t, n_var=-1)
    2713         9350 :       CALL section_add_keyword(subsection, keyword)
    2714         9350 :       CALL keyword_release(keyword)
    2715              :       CALL keyword_create(keyword, __LOCATION__, name="RHO", &
    2716              :                           description="Spatial distributions averaged over all environments", &
    2717              :                           repeats=.TRUE., usage="RHO <REAL> <REAL> .. <REAL>", &
    2718         9350 :                           type_of_var=real_t, n_var=-1)
    2719         9350 :       CALL section_add_keyword(subsection, keyword)
    2720         9350 :       CALL keyword_release(keyword)
    2721              :       CALL keyword_create(keyword, __LOCATION__, name="IWEIGHT", &
    2722              :                           description="Weight for the restarted quantities "// &
    2723              :                           "(number of MC steps used to calculate the accumulated averages)", &
    2724              :                           repeats=.FALSE., &
    2725         9350 :                           default_i_val=0)
    2726         9350 :       CALL section_add_keyword(subsection, keyword)
    2727         9350 :       CALL keyword_release(keyword)
    2728         9350 :       CALL section_add_subsection(section, subsection)
    2729         9350 :       CALL section_release(subsection)
    2730              : 
    2731              :       CALL section_create(subsection, __LOCATION__, name="FORCE", &
    2732              :                           description="Forces exerted by the helium on the solute system"// &
    2733              :                           " (used for restarts)", &
    2734         9350 :                           n_keywords=1, n_subsections=0, repeats=.FALSE.)
    2735              :       CALL keyword_create(keyword, __LOCATION__, name="_DEFAULT_KEYWORD_", &
    2736              :                           description="Number of real values should be 3 * "// &
    2737              :                           "<num_solute_atoms> * <num_solute_beads>", repeats=.TRUE., &
    2738              :                           usage="<REAL> <REAL> .. <REAL>", type_of_var=real_t, &
    2739         9350 :                           n_var=-1)
    2740         9350 :       CALL section_add_keyword(subsection, keyword)
    2741         9350 :       CALL keyword_release(keyword)
    2742         9350 :       CALL section_add_subsection(section, subsection)
    2743         9350 :       CALL section_release(subsection)
    2744              : 
    2745              :       CALL section_create(subsection, __LOCATION__, name="RNG_STATE", &
    2746              :                           description="Random number generator state for all processors", &
    2747         9350 :                           n_keywords=1, n_subsections=0, repeats=.FALSE.)
    2748              :       CALL keyword_create(keyword, __LOCATION__, name="_DEFAULT_KEYWORD_", &
    2749              :                           description="Three real arrays of DIMENSION(3,2) times two RNG "// &
    2750              :                           "streams - 36 real values per processor", &
    2751              :                           repeats=.TRUE., usage="automatically filled, do not edit by hand", &
    2752         9350 :                           type_of_var=real_t, n_var=-1)
    2753         9350 :       CALL section_add_keyword(subsection, keyword)
    2754         9350 :       CALL keyword_release(keyword)
    2755         9350 :       CALL section_add_subsection(section, subsection)
    2756         9350 :       CALL section_release(subsection)
    2757              : 
    2758              :       CALL section_create(subsection, __LOCATION__, name="PRINT", &
    2759              :                           description="The section that controls the output of the helium code", &
    2760         9350 :                           n_keywords=16, n_subsections=0, repeats=.FALSE.)
    2761              : 
    2762              :       ! *************************************************************************
    2763              :       !> Printkeys for properties output
    2764              :       ! *************************************************************************
    2765         9350 :       NULLIFY (print_key)
    2766              : 
    2767              :       ! Properties printed at SILENT print level
    2768              :       !
    2769              : 
    2770              :       ! Properties printed at LOW print level
    2771              :       !
    2772              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ENERGY", &
    2773              :                                        description="Controls the output of helium energies"// &
    2774              :                                        " (averaged over MC step)", &
    2775         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2776         9350 :       CALL section_add_subsection(subsection, print_key)
    2777         9350 :       CALL section_release(print_key)
    2778              :       !
    2779              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "PROJECTED_AREA_2_AVG", &
    2780              :                                        description="Controls the output of the average projected area squared vector", &
    2781         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2782         9350 :       CALL section_add_subsection(subsection, print_key)
    2783         9350 :       CALL section_release(print_key)
    2784              :       !
    2785              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "WINDING_NUMBER_2_AVG", &
    2786              :                                        description="Controls the output of the average winding number vector squared", &
    2787         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2788         9350 :       CALL section_add_subsection(subsection, print_key)
    2789         9350 :       CALL section_release(print_key)
    2790              :       !
    2791              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "MOMENT_OF_INERTIA_AVG", &
    2792              :                                        description="Controls the output of the average moment of inertia vector", &
    2793         9350 :                                        print_level=low_print_level, common_iter_levels=1)
    2794         9350 :       CALL section_add_subsection(subsection, print_key)
    2795         9350 :       CALL section_release(print_key)
    2796              : 
    2797              :       ! Properties printed at MEDIUM print level
    2798              :       !
    2799              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "RDF", &
    2800              :                                        description="Controls the output of helium radial distribution functions", &
    2801         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2802         9350 :       CALL section_add_subsection(subsection, print_key)
    2803         9350 :       CALL section_release(print_key)
    2804              : 
    2805              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "RHO", &
    2806              :                                        description="Controls the output of the helium density "// &
    2807              :                                        "(Gaussian cube file format)", &
    2808              :                                        each_iter_names=s2a("PINT"), each_iter_values=[100], &
    2809              :                                        print_level=medium_print_level, common_iter_levels=1, &
    2810         9350 :                                        add_last=add_last_numeric)
    2811              :       CALL keyword_create(keyword, __LOCATION__, name="BACKUP_COPIES", &
    2812              :                           description="Specifies the maximum number of backup copies.", &
    2813              :                           usage="BACKUP_COPIES {int}", &
    2814         9350 :                           default_i_val=1)
    2815         9350 :       CALL section_add_keyword(print_key, keyword)
    2816         9350 :       CALL keyword_release(keyword)
    2817         9350 :       CALL section_add_subsection(subsection, print_key)
    2818         9350 :       CALL section_release(print_key)
    2819              :       !
    2820              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "PROJECTED_AREA", &
    2821              :                                        description="Controls the output of the projected area vector", &
    2822         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2823         9350 :       CALL section_add_subsection(subsection, print_key)
    2824         9350 :       CALL section_release(print_key)
    2825              :       !
    2826              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "WINDING_NUMBER", &
    2827              :                                        description="Controls the output of the winding number vector", &
    2828         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2829         9350 :       CALL section_add_subsection(subsection, print_key)
    2830         9350 :       CALL section_release(print_key)
    2831              :       !
    2832              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "MOMENT_OF_INERTIA", &
    2833              :                                        description="Controls the output of the moment of inertia vector", &
    2834         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2835         9350 :       CALL section_add_subsection(subsection, print_key)
    2836         9350 :       CALL section_release(print_key)
    2837              :       !
    2838              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "PLENGTH", &
    2839              :                                        description="Controls the output of the helium permutation length", &
    2840         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2841         9350 :       CALL section_add_subsection(subsection, print_key)
    2842         9350 :       CALL section_release(print_key)
    2843              : 
    2844              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ACTION", &
    2845              :                                        description="Controls the output of the total helium action", &
    2846         9350 :                                        print_level=medium_print_level, common_iter_levels=1)
    2847         9350 :       CALL section_add_subsection(subsection, print_key)
    2848         9350 :       CALL section_release(print_key)
    2849              : 
    2850              :       ! Properties printed at HIGH print level
    2851              :       !
    2852              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "COORDINATES", &
    2853              :                                        description="Controls the output of helium coordinates", &
    2854         9350 :                                        print_level=high_print_level, common_iter_levels=1)
    2855              :       CALL keyword_create(keyword, __LOCATION__, name="FORMAT", &
    2856              :                           description="Output file format for the coordinates", &
    2857              :                           usage="FORMAT (PDB|XYZ)", &
    2858              :                           default_i_val=fmt_id_pdb, &
    2859              :                           enum_c_vals=s2a("PDB", "XYZ"), &
    2860              :                           enum_i_vals=[fmt_id_pdb, fmt_id_xyz], &
    2861              :                           enum_desc=s2a("Bead coordinates and connectivity is written in PDB format", &
    2862         9350 :                                         "Only bead coordinates are written in XYZ format"))
    2863         9350 :       CALL section_add_keyword(print_key, keyword)
    2864         9350 :       CALL keyword_release(keyword)
    2865         9350 :       CALL section_add_subsection(subsection, print_key)
    2866         9350 :       CALL section_release(print_key)
    2867              :       !
    2868              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "PERM", &
    2869              :                                        description="Controls the output of the helium permutation state", &
    2870         9350 :                                        print_level=high_print_level, common_iter_levels=1)
    2871              :       CALL keyword_create(keyword, __LOCATION__, name="FORMAT", &
    2872              :                           description="Output format for the permutation", &
    2873              :                           usage="FORMAT (CYCLE|PLAIN)", &
    2874              :                           default_i_val=perm_cycle, &
    2875              :                           enum_c_vals=s2a("CYCLE", "PLAIN"), &
    2876              :                           enum_i_vals=[perm_cycle, perm_plain], &
    2877              :                           enum_desc=s2a( &
    2878              :                           "Cycle notation with winding cycles enclosed"// &
    2879              :                           " in '[...]' and non-winding ones enclosed in '(...)'", &
    2880         9350 :                           "Plain permutation output, i.e. P(1) ... P(N)"))
    2881         9350 :       CALL section_add_keyword(print_key, keyword)
    2882         9350 :       CALL keyword_release(keyword)
    2883         9350 :       CALL section_add_subsection(subsection, print_key)
    2884         9350 :       CALL section_release(print_key)
    2885              : 
    2886              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "FORCES", &
    2887              :                                        description="Controls the output of the helium forces on the solute", &
    2888         9350 :                                        print_level=high_print_level, common_iter_levels=1)
    2889         9350 :       CALL section_add_subsection(subsection, print_key)
    2890         9350 :       CALL section_release(print_key)
    2891              : 
    2892              :       ! Properties printed at DEBUG print level
    2893              :       !
    2894              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "ACCEPTS", &
    2895              :                                        description="Controls the output of the helium acceptance data", &
    2896         9350 :                                        print_level=debug_print_level, common_iter_levels=1)
    2897         9350 :       CALL section_add_subsection(subsection, print_key)
    2898         9350 :       CALL section_release(print_key)
    2899              :       !
    2900              :       CALL cp_print_key_section_create(print_key, __LOCATION__, "FORCES_INST", &
    2901              :                                        description="Controls the output of the instantaneous helium forces on the solute", &
    2902         9350 :                                        print_level=debug_print_level, common_iter_levels=1)
    2903         9350 :       CALL section_add_subsection(subsection, print_key)
    2904         9350 :       CALL section_release(print_key)
    2905              : 
    2906         9350 :       CALL section_add_subsection(section, subsection)
    2907         9350 :       CALL section_release(subsection)
    2908              : 
    2909         9350 :       RETURN
    2910              :    END SUBROUTINE create_helium_section
    2911              : 
    2912              : END MODULE input_cp2k_motion
        

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