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qp2/plugins/local/cipsi_tc_bi_ortho/pt2.irp.f

73 lines
2.1 KiB
Fortran

subroutine tc_pt2
use selection_types
implicit none
BEGIN_DOC
! Selected Full Configuration Interaction with Stochastic selection and PT2.
END_DOC
integer :: i,j,k,ndet
double precision, allocatable :: zeros(:)
integer :: to_select
type(pt2_type) :: pt2_data, pt2_data_err
logical, external :: qp_stop
logical :: print_pt2
double precision :: rss
double precision, external :: memory_of_double
double precision :: correlation_energy_ratio,E_denom,E_tc,norm
double precision, allocatable :: ept2(:), pt1(:),extrap_energy(:)
PROVIDE H_apply_buffer_allocated distributed_davidson
print*,'Diagonal elements of the Fock matrix '
do i = 1, mo_num
write(*,*)i,Fock_matrix_tc_mo_tot(i,i)
enddo
N_iter = 1
threshold_generators = 1.d0
SOFT_TOUCH threshold_generators
rss = memory_of_double(N_states)*4.d0
call check_mem(rss,irp_here)
allocate (zeros(N_states))
call pt2_alloc(pt2_data, N_states)
call pt2_alloc(pt2_data_err, N_states)
double precision :: hf_energy_ref
logical :: has
double precision :: relative_error
relative_error=PT2_relative_error
zeros = 0.d0
pt2_data % pt2 = -huge(1.e0)
pt2_data % rpt2 = -huge(1.e0)
pt2_data % overlap= 0.d0
pt2_data % variance = huge(1.e0)
!!!! WARNING !!!! SEEMS TO BE PROBLEM WTH make_s2_eigenfunction !!!! THE DETERMINANTS CAN APPEAR TWICE IN THE WFT DURING SELECTION
! if (s2_eig) then
! call make_s2_eigenfunction
! endif
print_pt2 = .False.
call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
! call routine_save_right
allocate(ept2(1000),pt1(1000),extrap_energy(100))
correlation_energy_ratio = 0.d0
! thresh_it_dav = 5.d-5
! soft_touch thresh_it_dav
print_pt2 = .True.
call pt2_dealloc(pt2_data)
call pt2_dealloc(pt2_data_err)
call pt2_alloc(pt2_data, N_states)
call pt2_alloc(pt2_data_err, N_states)
call ZMQ_pt2(E_tc, pt2_data, pt2_data_err, relative_error,0) ! Stochastic PT2 and selection
call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
end