2014-06-20 18:35:26 +02:00
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BEGIN_PROVIDER [ double precision, one_body_dm_mo_alpha, (mo_tot_num_align,mo_tot_num) ]
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&BEGIN_PROVIDER [ double precision, one_body_dm_mo_beta, (mo_tot_num_align,mo_tot_num) ]
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implicit none
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BEGIN_DOC
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! Alpha and beta one-body density matrix for each state
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END_DOC
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integer :: j,k,l,m
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integer :: occ(N_int*bit_kind_size,2)
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double precision :: ck, cl, ckl
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double precision :: phase
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integer :: h1,h2,p1,p2,s1,s2, degree
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integer :: exc(0:2,2,2),n_occ_alpha
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double precision, allocatable :: tmp_a(:,:), tmp_b(:,:)
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one_body_dm_mo_alpha = 0.d0
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one_body_dm_mo_beta = 0.d0
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!$OMP PARALLEL DEFAULT(NONE) &
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!$OMP PRIVATE(j,k,l,m,occ,ck, cl, ckl,phase,h1,h2,p1,p2,s1,s2, degree,exc, &
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!$OMP tmp_a, tmp_b, n_occ_alpha)&
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!$OMP SHARED(psi_det,psi_coef,N_int,N_states,state_average_weight,elec_alpha_num,&
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!$OMP elec_beta_num,one_body_dm_mo_alpha,one_body_dm_mo_beta,N_det,mo_tot_num_align,&
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!$OMP mo_tot_num)
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allocate(tmp_a(mo_tot_num_align,mo_tot_num), tmp_b(mo_tot_num_align,mo_tot_num) )
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tmp_a = 0.d0
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tmp_b = 0.d0
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!$OMP DO SCHEDULE(dynamic)
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do k=1,N_det
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call bitstring_to_list(psi_det(1,1,k), occ(1,1), n_occ_alpha, N_int)
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call bitstring_to_list(psi_det(1,2,k), occ(1,2), n_occ_alpha, N_int)
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do m=1,N_states
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ck = psi_coef(k,m)*psi_coef(k,m) * state_average_weight(m)
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do l=1,elec_alpha_num
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j = occ(l,1)
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tmp_a(j,j) += ck
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enddo
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do l=1,elec_beta_num
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j = occ(l,2)
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tmp_b(j,j) += ck
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enddo
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enddo
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do l=1,k-1
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call get_excitation_degree(psi_det(1,1,k),psi_det(1,1,l),degree,N_int)
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if (degree /= 1) then
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cycle
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endif
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call get_mono_excitation(psi_det(1,1,k),psi_det(1,1,l),exc,phase,N_int)
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call decode_exc(exc,degree,h1,p1,h2,p2,s1,s2)
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do m=1,N_states
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ckl = psi_coef(k,m) * psi_coef(l,m) * phase * state_average_weight(m)
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if (s1==1) then
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tmp_a(h1,p1) += ckl
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tmp_a(p1,h1) += ckl
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else
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tmp_b(h1,p1) += ckl
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tmp_b(p1,h1) += ckl
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endif
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enddo
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enddo
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enddo
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!$OMP END DO NOWAIT
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!$OMP CRITICAL
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one_body_dm_mo_alpha = one_body_dm_mo_alpha + tmp_a
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!$OMP END CRITICAL
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!$OMP CRITICAL
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one_body_dm_mo_beta = one_body_dm_mo_beta + tmp_b
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!$OMP END CRITICAL
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deallocate(tmp_a,tmp_b)
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!$OMP BARRIER
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!$OMP END PARALLEL
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END_PROVIDER
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BEGIN_PROVIDER [ double precision, one_body_dm_mo, (mo_tot_num_align,mo_tot_num) ]
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implicit none
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BEGIN_DOC
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! One-body density matrix
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END_DOC
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one_body_dm_mo = one_body_dm_mo_alpha + one_body_dm_mo_beta
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END_PROVIDER
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2014-06-25 14:58:58 +02:00
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subroutine set_natural_mos
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2014-06-20 18:35:26 +02:00
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implicit none
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BEGIN_DOC
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2014-06-25 14:58:58 +02:00
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! Set natural orbitals, obtained by diagonalization of the one-body density matrix in the MO basis
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2014-06-20 18:35:26 +02:00
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END_DOC
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character*(64) :: label
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double precision, allocatable :: tmp(:,:)
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allocate(tmp(size(one_body_dm_mo,1),size(one_body_dm_mo,2)))
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! Negation to have the occupied MOs first after the diagonalization
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tmp = -one_body_dm_mo
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label = "Natural"
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call mo_as_eigvectors_of_mo_matrix(tmp,size(tmp,1),size(tmp,2),label)
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deallocate(tmp)
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end
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2014-06-25 14:58:58 +02:00
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subroutine save_natural_mos
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implicit none
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BEGIN_DOC
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! Save natural orbitals, obtained by diagonalization of the one-body density matrix in the MO basis
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END_DOC
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call set_natural_mos
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call save_mos
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end
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2014-06-20 18:35:26 +02:00
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BEGIN_PROVIDER [ double precision, state_average_weight, (N_states) ]
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implicit none
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BEGIN_DOC
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! Weights in the state-average calculation of the density matrix
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END_DOC
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state_average_weight = 1.d0/dble(N_states)
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END_PROVIDER
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