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https://github.com/QuantumPackage/qp2.git
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165 lines
5.1 KiB
Fortran
165 lines
5.1 KiB
Fortran
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! ---
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subroutine run_stochastic_cipsi
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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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use selection_types
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implicit none
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integer :: i, j, k, ndet
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integer :: to_select
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logical :: print_pt2
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logical :: has
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type(pt2_type) :: pt2_data, pt2_data_err
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double precision :: rss
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double precision :: correlation_energy_ratio, E_denom, E_tc, norm
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double precision :: hf_energy_ref
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double precision :: relative_error
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double precision, allocatable :: ept2(:), pt1(:), extrap_energy(:)
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double precision, allocatable :: zeros(:)
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logical, external :: qp_stop
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double precision, external :: memory_of_double
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PROVIDE mo_l_coef mo_r_coef
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PROVIDE H_apply_buffer_allocated distributed_davidson
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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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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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!!!! 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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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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! if (N_det > N_det_max) then
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! psi_det(1:N_int,1:2,1:N_det) = psi_det_generators(1:N_int,1:2,1:N_det)
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! psi_coef(1:N_det,1:N_states) = psi_coef_sorted_tc_gen(1:N_det,1:N_states)
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! N_det = N_det_max
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! soft_touch N_det psi_det psi_coef
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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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! 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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! endif
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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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do while( (N_det < N_det_max) .and. &
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(maxval(abs(pt2_data % pt2(1:N_states))) > pt2_max))
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print*,'maxval(abs(pt2_data % pt2(1:N_states)))',maxval(abs(pt2_data % pt2(1:N_states)))
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print*,pt2_max
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write(*,'(A)') '--------------------------------------------------------------------------------'
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to_select = int(sqrt(dble(N_states))*dble(N_det)*selection_factor)
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to_select = max(N_states_diag, to_select)
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E_denom = E_tc ! TC Energy of the current wave function
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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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call ZMQ_pt2(E_denom, pt2_data, pt2_data_err, relative_error,to_select) ! Stochastic PT2 and selection
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! stop
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call print_summary(psi_energy_with_nucl_rep, pt2_data, pt2_data_err, N_det, N_configuration, N_states, psi_s2)
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call save_energy(psi_energy_with_nucl_rep, pt2_data % pt2)
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call increment_n_iter(psi_energy_with_nucl_rep, pt2_data)
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call print_extrapolated_energy()
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! call print_mol_properties()
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call write_cipsi_json(pt2_data,pt2_data_err)
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if (qp_stop()) exit
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! Add selected determinants
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call copy_H_apply_buffer_to_wf_tc()
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PROVIDE psi_l_coef_bi_ortho psi_r_coef_bi_ortho
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PROVIDE psi_det
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PROVIDE psi_det_sorted_tc
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ept2(N_iter-1) = E_tc + nuclear_repulsion + (pt2_data % pt2(1))/norm
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pt1(N_iter-1) = dsqrt(pt2_data % overlap(1,1))
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call diagonalize_CI_tc_bi_ortho(ndet, E_tc, norm, pt2_data, print_pt2)
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! stop
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if (qp_stop()) exit
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enddo
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! print*,'data to extrapolate '
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! do i = 2, N_iter
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! print*,'iteration ',i
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! print*,'pt1,Ept2',pt1(i),ept2(i)
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! call get_extrapolated_energy(i-1,ept2(i),pt1(i),extrap_energy(i))
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! do j = 2, i
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! print*,'j,e,energy',j,extrap_energy(j)
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! enddo
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! enddo
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! thresh_it_dav = 5.d-6
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! soft_touch thresh_it_dav
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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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call ZMQ_pt2(E_tc, pt2_data, pt2_data_err, relative_error,0) ! Stochastic PT2 and selection
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call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
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! if (.not.qp_stop()) then
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! if (N_det < N_det_max) then
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! thresh_it_dav = 5.d-7
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! soft_touch thresh_it_dav
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! call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
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! endif
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!
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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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! call ZMQ_pt2(E_denom, pt2_data, pt2_data_err, relative_error, 0) ! Stochastic PT2
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! call diagonalize_CI_tc_bi_ortho(ndet, E_tc,norm,pt2_data,print_pt2)
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! endif
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! call pt2_dealloc(pt2_data)
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! call pt2_dealloc(pt2_data_err)
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! call routine_save_right
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end
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