quantum_package/plugins/analyze_wf/occupation.irp.f

27 lines
819 B
Fortran

subroutine get_occupation_from_dets(istate,occupation)
implicit none
double precision, intent(out) :: occupation(mo_tot_num)
integer, intent(in) :: istate
BEGIN_DOC
! Returns the average occupation of the MOs
END_DOC
integer :: i,j, ispin
integer :: list(N_int*bit_kind_size,2)
integer :: n_elements(2)
double precision :: c
ASSERT (istate > 0)
ASSERT (istate <= N_states)
occupation = 0.d0
do i=1,N_det
c = psi_coef(i,istate)*psi_coef(i,istate)
call bitstring_to_list_ab(psi_det(1,1,i), list, n_elements, N_int)
do ispin=1,2
do j=1,n_elements(ispin)
ASSERT ( list(j,ispin) < mo_tot_num )
occupation( list(j,ispin) ) += c
enddo
enddo
enddo
end