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146
plugins/Full_CI_ZMQ/fci_zmq_pt2.irp.f
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146
plugins/Full_CI_ZMQ/fci_zmq_pt2.irp.f
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program fci_zmq
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implicit none
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integer :: i,j,k
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double precision, allocatable :: pt2(:)
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integer :: degree
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integer :: n_det_before, to_select
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double precision :: threshold_davidson_in
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allocate (pt2(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=1.d-3
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pt2 = -huge(1.d0)
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threshold_davidson_in = threshold_davidson
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threshold_davidson = threshold_davidson_in * 100.d0
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SOFT_TOUCH threshold_davidson
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call diagonalize_CI
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call save_wavefunction
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call ezfio_has_hartree_fock_energy(has)
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if (has) then
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call ezfio_get_hartree_fock_energy(hf_energy_ref)
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else
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hf_energy_ref = ref_bitmask_energy
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endif
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if (N_det > N_det_max) then
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psi_det = psi_det_sorted
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psi_coef = psi_coef_sorted
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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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call diagonalize_CI
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call save_wavefunction
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print *, 'N_det = ', N_det
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print *, 'N_states = ', N_states
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do k=1,N_states
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print*,'State ',k
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print *, 'PT2 = ', pt2(k)
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print *, 'E = ', CI_energy(k)
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print *, 'E+PT2 = ', CI_energy(k) + pt2(k)
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print *, '-----'
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enddo
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endif
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print*,'Beginning the selection ...'
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n_det_before = 0
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double precision :: correlation_energy_ratio
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double precision :: threshold_selectors_save, threshold_generators_save
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threshold_selectors_save = threshold_selectors
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threshold_generators_save = threshold_generators
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correlation_energy_ratio = 0.d0
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if (.True.) then ! Avoid pre-calculation of CI_energy
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do while ( &
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(N_det < N_det_max) .and. &
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(maxval(abs(pt2(1:N_states))) > pt2_max) .and. &
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(correlation_energy_ratio <= correlation_energy_ratio_max) &
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)
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pt2 = 0.d0
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if (N_states == 1) then
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threshold_selectors = 1.d0
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threshold_generators = 1d0
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SOFT_TOUCH threshold_selectors threshold_generators
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call ZMQ_pt2(CI_energy, pt2,relative_error) ! Stochastic PT2
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threshold_selectors = threshold_selectors_save
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threshold_generators = threshold_generators_save
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SOFT_TOUCH threshold_selectors threshold_generators
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else
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threshold_selectors = max(threshold_selectors,threshold_selectors_pt2)
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threshold_generators = max(threshold_generators,threshold_generators_pt2)
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SOFT_TOUCH threshold_selectors threshold_generators
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call ZMQ_selection(0, pt2) ! Deterministic PT2
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endif
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correlation_energy_ratio = (CI_energy(1) - hf_energy_ref) / &
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(CI_energy(1) + pt2(1) - hf_energy_ref)
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correlation_energy_ratio = min(1.d0,correlation_energy_ratio)
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print *, 'N_det = ', N_det
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print *, 'N_states = ', N_states
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print*, 'correlation_ratio = ', correlation_energy_ratio
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do k=1, N_states
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print*,'State ',k
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print *, 'PT2 = ', pt2(k)
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print *, 'E = ', CI_energy(k)
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print *, 'E+PT2 = ', CI_energy(k)+pt2(k)
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enddo
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print *, '-----'
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if(N_states.gt.1)then
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print*,'Variational Energy difference'
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do i = 2, N_states
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print*,'Delta E = ',CI_energy(i) - CI_energy(1)
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enddo
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endif
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if(N_states.gt.1)then
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print*,'Variational + perturbative Energy difference'
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do i = 2, N_states
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print*,'Delta E = ',CI_energy(i)+ pt2(i) - (CI_energy(1) + pt2(1))
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enddo
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endif
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n_det_before = N_det
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to_select = N_det
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to_select = max(N_det, to_select)
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to_select = min(to_select, N_det_max-n_det_before)
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call ZMQ_selection(to_select, pt2)
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PROVIDE psi_coef
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PROVIDE psi_det
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PROVIDE psi_det_sorted
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if (N_det >= N_det_max) then
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threshold_davidson = threshold_davidson_in
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end if
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call diagonalize_CI
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call save_wavefunction
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call ezfio_set_full_ci_zmq_energy(CI_energy(1))
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call ezfio_set_full_ci_zmq_energy_pt2(CI_energy(1)+pt2(1))
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enddo
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endif
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if (N_det < N_det_max) then
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threshold_davidson = threshold_davidson_in
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call diagonalize_CI
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call save_wavefunction
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call ezfio_set_full_ci_zmq_energy(CI_energy(1))
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call ezfio_set_full_ci_zmq_energy_pt2(CI_energy(1)+pt2(1))
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endif
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end
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