subroutine guess_hcore(infos)
use precision, only: dp
use types, only: information
use io_constants, only: IW
use oqp_tagarray_driver
use basis_tools, only: basis_set
use guess, only: get_ab_initio_density, &
get_ab_initio_orbital
use mathlib, only: matrix_invsqrt
use util, only: measure_time
use messages, only: show_message, WITH_ABORT
use strings, only: Cstring, fstring
use printing, only: print_module_info
implicit none
character(len=*), parameter :: subroutine_name = "guess_hcore"
type(information), target, intent(inout) :: infos
!
integer :: nbf2, nbf, ok
!
real(kind=dp), allocatable :: qmat(:,:)
type(basis_set), pointer :: basis
!
! tagarray
real(kind=dp), contiguous, pointer :: &
Hcore(:), Smat(:), &
dmat_a(:), mo_a(:,:), mo_energy_a(:), &
dmat_b(:), mo_b(:,:), mo_energy_b(:)
character(len=*), parameter :: tags_alpha(3) = (/ character(len=80) :: &
OQP_DM_A, OQP_E_MO_A, OQP_VEC_MO_A /)
character(len=*), parameter :: tags_beta(3) = (/ character(len=80) :: &
OQP_DM_B, OQP_E_MO_B, OQP_VEC_MO_B /)
character(len=*), parameter :: tags_general(2) = (/ character(len=80) :: &
OQP_SM, OQP_Hcore /)
! Files open
! 1. XYZ: Read : Geometric data, ATOMS
! 3. LOG: Read Write: Main output file
!
open (unit=IW, file=infos%log_filename, position="append")
!
!
call print_module_info('guess_Hcore','Initial Guess using H Matrix')
! load basis set
basis => infos%basis
basis%atoms => infos%atoms
! Allocate H, S ,T and D matrices
nbf = basis%nbf
nbf2 = nbf*(nbf+1)/2
allocate (qmat(nbf,nbf), stat=ok)
if (ok /= 0) call show_message('Cannot allocate memory', WITH_ABORT)
! clean data
call infos%dat%remove_records(tags_alpha)
call infos%dat%remove_records(tags_beta)
! load general data
call data_has_tags(infos%dat, tags_general, module_name, subroutine_name, WITH_ABORT)
call tagarray_get_data(infos%dat, OQP_SM, smat)
call tagarray_get_data(infos%dat, OQP_Hcore, hcore)
! allocate alpha
call infos%dat%reserve_data(OQP_DM_A, TA_TYPE_REAL64, nbf2, comment=OQP_DM_A_comment)
call infos%dat%reserve_data(OQP_E_MO_A, TA_TYPE_REAL64, nbf, comment=OQP_E_MO_A_comment)
call infos%dat%reserve_data(OQP_VEC_MO_A, TA_TYPE_REAL64, nbf*nbf, (/ nbf, nbf /), comment=OQP_VEC_MO_A_comment)
! load alpha data
call data_has_tags(infos%dat, tags_alpha, module_name, subroutine_name, WITH_ABORT)
call tagarray_get_data(infos%dat, OQP_DM_A, dmat_a)
call tagarray_get_data(infos%dat, OQP_E_MO_A, mo_energy_a)
call tagarray_get_data(infos%dat, OQP_VEC_MO_A, mo_a)
! UHF/ROHF
if (infos%control%scftype >= 2) then
! allocate beta
call infos%dat%reserve_data(OQP_DM_B, TA_TYPE_REAL64, nbf2, comment=OQP_DM_B_comment)
call infos%dat%reserve_data(OQP_E_MO_B, TA_TYPE_REAL64, nbf, comment=OQP_E_MO_B_comment)
call infos%dat%reserve_data(OQP_VEC_MO_B, TA_TYPE_REAL64, nbf*nbf, (/ nbf, nbf /), comment=OQP_VEC_MO_B_comment)
! load beta
call data_has_tags(infos%dat, tags_beta, module_name, subroutine_name, WITH_ABORT)
call tagarray_get_data(infos%dat, OQP_DM_B, dmat_b)
call tagarray_get_data(infos%dat, OQP_E_MO_B, mo_energy_b)
call tagarray_get_data(infos%dat, OQP_VEC_MO_B, mo_b)
end if
! End of Readings.................................
!
call matrix_invsqrt(smat, qmat, nbf)
!
! Calculate Hcore MO
call Get_ab_initio_orbital(Hcore, MO_A, MO_Energy_A, QMat)
! For ROHF/UHF
if (INFOS%control%scftype >= 2) MO_B = MO_A
!
! Calculate Density Matrix
! RHF
if (INFOS%control%scftype == 1) then
call get_ab_initio_density(Dmat_A, MO_A, infos=infos, basis=basis)
! ROHF/UHF
else
call get_ab_initio_density(Dmat_A, MO_A, Dmat_B, MO_B, infos, basis)
end if
write (IW, 9090)
call measure_time(print_total=1, log_unit=iw)
close(IW)
9090 format(/1x, '...... End Of Initial Orbital Guess ......'/)
end subroutine guess_hcore