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https://github.com/pfloos/quack
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194 lines
7.2 KiB
Fortran
194 lines
7.2 KiB
Fortran
subroutine Bethe_Salpeter_Tmatrix(TDA_T,TDA,dBSE,dTDA,evDyn,singlet,triplet,eta,nBas,nC,nO,nV,nR,nS,nOOs,nVVs,nOOt,nVVt, &
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Omega1s,X1s,Y1s,Omega2s,X2s,Y2s,rho1s,rho2s,Omega1t,X1t,Y1t,Omega2t,X2t,Y2t,rho1t,rho2t, &
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ERI,dipole_int,eT,eGT,EcBSE)
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! Compute the Bethe-Salpeter excitation energies with the T-matrix kernel
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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) :: TDA_T
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logical,intent(in) :: TDA
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logical,intent(in) :: dBSE
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logical,intent(in) :: dTDA
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logical,intent(in) :: evDyn
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logical,intent(in) :: singlet
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logical,intent(in) :: triplet
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double precision,intent(in) :: eta
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integer,intent(in) :: nBas
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integer,intent(in) :: nC
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integer,intent(in) :: nO
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integer,intent(in) :: nV
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integer,intent(in) :: nR
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integer,intent(in) :: nS
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integer,intent(in) :: nOOs
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integer,intent(in) :: nOOt
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integer,intent(in) :: nVVs
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integer,intent(in) :: nVVt
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double precision,intent(in) :: eT(nBas)
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double precision,intent(in) :: eGT(nBas)
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double precision,intent(in) :: ERI(nBas,nBas,nBas,nBas)
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double precision,intent(in) :: dipole_int(nBas,nBas,ncart)
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double precision,intent(in) :: Omega1s(nVVs)
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double precision,intent(in) :: X1s(nVVs,nVVs)
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double precision,intent(in) :: Y1s(nOOs,nVVs)
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double precision,intent(in) :: Omega2s(nOOs)
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double precision,intent(in) :: X2s(nVVs,nOOs)
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double precision,intent(in) :: Y2s(nOOs,nOOs)
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double precision,intent(in) :: rho1s(nBas,nBas,nVVs)
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double precision,intent(in) :: rho2s(nBas,nBas,nOOs)
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double precision,intent(in) :: Omega1t(nVVt)
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double precision,intent(in) :: X1t(nVVt,nVVt)
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double precision,intent(in) :: Y1t(nOOt,nVVt)
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double precision,intent(in) :: Omega2t(nOOt)
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double precision,intent(in) :: X2t(nVVt,nOOt)
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double precision,intent(in) :: Y2t(nOOt,nOOt)
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double precision,intent(in) :: rho1t(nBas,nBas,nVVt)
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double precision,intent(in) :: rho2t(nBas,nBas,nOOt)
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! Local variables
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integer :: ispin
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integer :: iblock
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double precision :: EcRPA(nspin)
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double precision,allocatable :: TAs(:,:),TBs(:,:)
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double precision,allocatable :: TAt(:,:),TBt(:,:)
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double precision,allocatable :: OmBSE(:,:)
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double precision,allocatable :: XpY_BSE(:,:,:)
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double precision,allocatable :: XmY_BSE(:,:,:)
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! Output variables
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double precision,intent(out) :: EcBSE(nspin)
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! Memory allocation
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allocate(TAs(nS,nS),TBs(nS,nS),TAt(nS,nS),TBt(nS,nS), &
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OmBSE(nS,nspin),XpY_BSE(nS,nS,nspin),XmY_BSE(nS,nS,nspin))
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!---------------------------------------!
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! Compute T-matrix for alpha-beta block !
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!---------------------------------------!
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ispin = 1
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iblock = 3
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call linear_response_pp(iblock,TDA_T,nBas,nC,nO,nV,nR,nOOs,nVVs,1d0,eT,ERI, &
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Omega1s,X1s,Y1s,Omega2s,X2s,Y2s,EcRPA(ispin))
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! call excitation_density_Tmatrix(iblock,nBas,nC,nO,nV,nR,nOOs,nVVs,ERI,X1s,Y1s,rho1s,X2s,Y2s,rho2s)
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call static_Tmatrix_A(eta,nBas,nC,nO,nV,nR,nS,nOOs,nVVs,1d0,Omega1s,rho1s,Omega2s,rho2s,TAs)
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if(.not.TDA) call static_Tmatrix_B(eta,nBas,nC,nO,nV,nR,nS,nOOs,nVVs,1d0,Omega1s,rho1s,Omega2s,rho2s,TBs)
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! print*,'ab block of TA'
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! call matout(nS,nS,TAs)
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! print*,'ab block of TB'
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! call matout(nS,nS,TBs)
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!----------------------------------------!
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! Compute T-matrix for alpha-alpha block !
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!----------------------------------------!
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ispin = 2
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iblock = 4
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call linear_response_pp(iblock,TDA_T,nBas,nC,nO,nV,nR,nOOt,nVVt,1d0,eT,ERI, &
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Omega1t,X1t,Y1t,Omega2t,X2t,Y2t,EcRPA(ispin))
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! call excitation_density_Tmatrix(iblock,nBas,nC,nO,nV,nR,nOOt,nVVt,ERI,X1t,Y1t,rho1t,X2t,Y2t,rho2t)
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call static_Tmatrix_A(eta,nBas,nC,nO,nV,nR,nS,nOOt,nVVt,1d0,Omega1t,rho1t,Omega2t,rho2t,TAt)
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if(.not.TDA) call static_Tmatrix_B(eta,nBas,nC,nO,nV,nR,nS,nOOt,nVVt,1d0,Omega1t,rho1t,Omega2t,rho2t,TBt)
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! print*,'aa block of TA'
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! call matout(nS,nS,TAt)
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! print*,'aa block of TB'
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! call matout(nS,nS,TBt)
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!------------------!
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! Singlet manifold !
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!------------------!
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if(singlet) then
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ispin = 1
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EcBSE(ispin) = 0d0
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! Compute BSE singlet excitation energies
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call linear_response_BSE(ispin,.false.,TDA,.true.,eta,nBas,nC,nO,nV,nR,nS,1d0,eGT,ERI,TAt+TAs,TBt+TBs, &
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EcBSE(ispin),OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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call print_excitation('BSE@GT ',ispin,nS,OmBSE(:,ispin))
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call print_transition_vectors(.true.,nBas,nC,nO,nV,nR,nS,dipole_int, &
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OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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if(dBSE) then
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! Compute dynamic correction for BSE via perturbation theory (iterative or renormalized)
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if(evDyn) then
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print*, ' Iterative dynamical correction for BSE@GT NYI'
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! call Bethe_Salpeter_dynamic_perturbation_iterative(dTDA,eta,nBas,nC,nO,nV,nR,nS,eGW,dipole_int,OmRPA,rho_RPA, &
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! OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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else
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call Bethe_Salpeter_Tmatrix_dynamic_perturbation(ispin,dTDA,eta,nBas,nC,nO,nV,nR,nS,nOOs,nVVs,nOOt,nVVt, &
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Omega1s,Omega2s,Omega1t,Omega2t,rho1s,rho2s,rho1t,rho2t,eT,eGT, &
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dipole_int,OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin), &
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TAs,TBs,TAt,TBt)
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end if
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end if
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end if
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!------------------!
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! Triplet manifold !
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!------------------!
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if(triplet) then
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ispin = 2
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EcBSE(ispin) = 0d0
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! Compute BSE triplet excitation energies
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call linear_response_BSE(ispin,.false.,TDA,.true.,eta,nBas,nC,nO,nV,nR,nS,1d0,eGT,ERI,TAt-TAs,TBt-TBs, &
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EcBSE(ispin),OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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call print_excitation('BSE@GT ',ispin,nS,OmBSE(:,ispin))
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call print_transition_vectors(.false.,nBas,nC,nO,nV,nR,nS,dipole_int, &
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OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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if(dBSE) then
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! Compute dynamic correction for BSE via perturbation theory (iterative or renormalized)
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if(evDyn) then
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print*, ' Iterative dynamical correction for BSE@GT NYI'
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! call Bethe_Salpeter_dynamic_perturbation_iterative(dTDA,eta,nBas,nC,nO,nV,nR,nS,eGW,dipole_int,OmRPA,rho_RPA, &
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! OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin))
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else
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call Bethe_Salpeter_Tmatrix_dynamic_perturbation(ispin,dTDA,eta,nBas,nC,nO,nV,nR,nS,nOOs,nVVs,nOOt,nVVt, &
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Omega1s,Omega2s,Omega1t,Omega2t,rho1s,rho2s,rho1t,rho2t,eT,eGT, &
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dipole_int,OmBSE(:,ispin),XpY_BSE(:,:,ispin),XmY_BSE(:,:,ispin), &
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TAs,TBs,TAt,TBt)
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end if
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end if
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end if
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end subroutine Bethe_Salpeter_Tmatrix
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