mirror of
https://github.com/pfloos/quack
synced 2024-12-23 12:55:25 +01:00
136 lines
3.9 KiB
Fortran
136 lines
3.9 KiB
Fortran
subroutine UCIS(spin_conserved,spin_flip,nBas,nC,nO,nV,nR,nS,ERI_aaaa,ERI_aabb,ERI_bbbb, &
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dipole_int_aa,dipole_int_bb,eHF,cHF,S)
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! Perform configuration interaction single calculation`
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implicit none
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include 'parameters.h'
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! Input variables
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logical,intent(in) :: spin_conserved
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logical,intent(in) :: spin_flip
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integer,intent(in) :: nBas
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integer,intent(in) :: nC(nspin)
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integer,intent(in) :: nO(nspin)
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integer,intent(in) :: nV(nspin)
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integer,intent(in) :: nR(nspin)
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integer,intent(in) :: nS(nspin)
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double precision,intent(in) :: eHF(nBas,nspin)
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double precision,intent(in) :: cHF(nBas,nBas,nspin)
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double precision,intent(in) :: S(nBas,nBas)
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double precision,intent(in) :: ERI_aaaa(nBas,nBas,nBas,nBas)
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double precision,intent(in) :: ERI_aabb(nBas,nBas,nBas,nBas)
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double precision,intent(in) :: ERI_bbbb(nBas,nBas,nBas,nBas)
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double precision,intent(in) :: dipole_int_aa(nBas,nBas,ncart,nspin)
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double precision,intent(in) :: dipole_int_bb(nBas,nBas,ncart,nspin)
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! Local variables
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logical :: dump_matrix = .false.
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logical :: dump_trans = .false.
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integer :: ispin
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double precision :: lambda
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integer :: nS_aa,nS_bb,nS_sc
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double precision,allocatable :: A_sc(:,:)
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double precision,allocatable :: Om_sc(:)
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integer :: nS_ab,nS_ba,nS_sf
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double precision,allocatable :: A_sf(:,:)
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double precision,allocatable :: Om_sf(:)
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! Hello world
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write(*,*)
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write(*,*)'************************************************'
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write(*,*)'| Configuration Interaction Singles |'
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write(*,*)'************************************************'
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write(*,*)
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! Adiabatic connection scaling
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lambda = 1d0
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!----------------------------!
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! Spin-conserved transitions !
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!----------------------------!
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if(spin_conserved) then
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ispin = 1
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! Memory allocation
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nS_aa = nS(1)
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nS_bb = nS(2)
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nS_sc = nS_aa + nS_bb
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allocate(A_sc(nS_sc,nS_sc),Om_sc(nS_sc))
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call phULR_A(ispin,.false.,nBas,nC,nO,nV,nR,nS_aa,nS_bb,nS_sc,lambda,eHF,ERI_aaaa,ERI_aabb,ERI_bbbb,A_sc)
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if(dump_matrix) then
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print*,'CIS matrix (spin-conserved transitions)'
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call matout(nS_sc,nS_sc,A_sc)
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write(*,*)
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endif
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call diagonalize_matrix(nS_sc,A_sc,Om_sc)
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A_sc(:,:) = transpose(A_sc)
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call print_excitation_energies('UCIS',5,nS_sc,Om_sc)
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call phULR_transition_vectors(ispin,nBas,nC,nO,nV,nR,nS,nS_aa,nS_bb,nS_sc,dipole_int_aa,dipole_int_bb, &
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cHF,S,Om_sc,A_sc,A_sc)
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if(dump_trans) then
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print*,'Spin-conserved CIS transition vectors'
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call matout(nS_sc,nS_sc,A_sc)
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write(*,*)
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endif
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deallocate(A_sc,Om_sc)
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endif
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!-----------------------!
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! Spin-flip transitions !
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!-----------------------!
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if(spin_flip) then
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ispin = 2
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! Memory allocation
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nS_ab = (nO(1) - nC(1))*(nV(2) - nR(2))
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nS_ba = (nO(2) - nC(2))*(nV(1) - nR(1))
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nS_sf = nS_ab + nS_ba
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allocate(A_sf(nS_sf,nS_sf),Om_sf(nS_sf))
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call phULR_A(ispin,.false.,nBas,nC,nO,nV,nR,nS_ab,nS_ba,nS_sf,lambda,eHF,ERI_aaaa,ERI_aabb,ERI_bbbb,A_sf)
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if(dump_matrix) then
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print*,'CIS matrix (spin-conserved transitions)'
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call matout(nS_sf,nS_sf,A_sf)
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write(*,*)
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endif
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call diagonalize_matrix(nS_sf,A_sf,Om_sf)
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A_sf(:,:) = transpose(A_sf)
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call print_excitation_energies('UCIS',6,nS_sf,Om_sf)
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call phULR_transition_vectors(ispin,nBas,nC,nO,nV,nR,nS,nS_ab,nS_ba,nS_sf,dipole_int_aa,dipole_int_bb, &
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cHF,S,Om_sf,A_sf,A_sf)
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if(dump_trans) then
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print*,'Spin-flip CIS transition vectors'
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call matout(nS_sf,nS_sf,A_sf)
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write(*,*)
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endif
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deallocate(A_sf,Om_sf)
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endif
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end subroutine
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