2023-05-01 14:00:04 +02:00
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subroutine tc_pt2
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2023-02-07 17:28:11 +01:00
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use selection_types
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implicit none
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BEGIN_DOC
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! Selected Full Configuration Interaction with Stochastic selection and PT2.
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END_DOC
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integer :: i,j,k,ndet
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double precision, allocatable :: zeros(:)
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integer :: to_select
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type(pt2_type) :: pt2_data, pt2_data_err
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logical, external :: qp_stop
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logical :: print_pt2
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double precision :: rss
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double precision, external :: memory_of_double
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double precision :: correlation_energy_ratio,E_denom,E_tc,norm
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double precision, allocatable :: ept2(:), pt1(:),extrap_energy(:)
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2023-05-01 14:00:04 +02:00
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PROVIDE H_apply_buffer_allocated distributed_davidson
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2023-02-07 17:28:11 +01:00
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print*,'Diagonal elements of the Fock matrix '
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do i = 1, mo_num
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write(*,*)i,Fock_matrix_tc_mo_tot(i,i)
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enddo
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N_iter = 1
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threshold_generators = 1.d0
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SOFT_TOUCH threshold_generators
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rss = memory_of_double(N_states)*4.d0
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call check_mem(rss,irp_here)
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allocate (zeros(N_states))
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call pt2_alloc(pt2_data, N_states)
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call pt2_alloc(pt2_data_err, N_states)
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double precision :: hf_energy_ref
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logical :: has
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double precision :: relative_error
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relative_error=PT2_relative_error
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zeros = 0.d0
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pt2_data % pt2 = -huge(1.e0)
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pt2_data % rpt2 = -huge(1.e0)
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pt2_data % overlap= 0.d0
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pt2_data % variance = huge(1.e0)
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2023-05-01 14:00:04 +02:00
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!!!! WARNING !!!! SEEMS TO BE PROBLEM WTH make_s2_eigenfunction !!!! THE DETERMINANTS CAN APPEAR TWICE IN THE WFT DURING SELECTION
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! if (s2_eig) then
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! call make_s2_eigenfunction
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! endif
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2023-02-07 17:28:11 +01:00
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print_pt2 = .False.
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call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
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! call routine_save_right
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allocate(ept2(1000),pt1(1000),extrap_energy(100))
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correlation_energy_ratio = 0.d0
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! thresh_it_dav = 5.d-5
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! soft_touch thresh_it_dav
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print_pt2 = .True.
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call pt2_dealloc(pt2_data)
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call pt2_dealloc(pt2_data_err)
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call pt2_alloc(pt2_data, N_states)
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call pt2_alloc(pt2_data_err, N_states)
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2024-05-08 17:26:48 +02:00
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if(transpose_two_e_int)then
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provide mo_bi_ortho_tc_two_e_transp tc_2e_3idx_coulomb_integrals_transp
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endif
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2023-05-01 14:00:04 +02:00
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call ZMQ_pt2(E_tc, pt2_data, pt2_data_err, relative_error,0) ! Stochastic PT2 and selection
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2023-02-07 17:28:11 +01:00
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call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
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2024-05-07 19:43:05 +02:00
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call print_summary_tc(psi_energy_with_nucl_rep, pt2_data, pt2_data_err, N_det, N_configuration, N_states, psi_s2)
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2023-02-07 17:28:11 +01:00
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end
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