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missing file

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Pierre-Francois Loos 2024-09-26 19:54:04 +02:00
parent 26fde9363c
commit 3494a6605a

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subroutine GGW_ppBSE_upfolded(nOrb,nC,nO,nV,nR,nS,ERI,rho,Om,eGW)
! Upfolded ppBSE@GW (TDA only!)
implicit none
include 'parameters.h'
! Input variables
integer,intent(in) :: nOrb
integer,intent(in) :: nC
integer,intent(in) :: nO
integer,intent(in) :: nV
integer,intent(in) :: nR
integer,intent(in) :: nS
double precision,intent(in) :: ERI(nOrb,nOrb,nOrb,nOrb)
double precision,intent(in) :: rho(nOrb,nOrb,nS)
double precision,intent(in) :: Om(nS)
double precision,intent(in) :: eGW(nOrb)
! Local variables
integer :: s
integer :: i,j,k,l
integer :: a,b,c,d
integer :: m,ij,kl,ijm
integer,parameter :: maxH = 1000
double precision :: tmp,tmp1,tmp2,tmp3,tmp4
integer :: n1h,n1p,n2h,n2p,n1h1p,n3h1p,n3p1h,n2h2p,nH
double precision,external :: Kronecker_delta
integer,allocatable :: order(:)
double precision,allocatable :: H(:,:)
double precision,allocatable :: X(:,:)
double precision,allocatable :: OmBSE(:)
double precision,allocatable :: Z(:)
! Output variables
! Hello world
write(*,*)
write(*,*)'*********************************'
write(*,*)'* Upfolded ppBSE@GW Calculation *'
write(*,*)'*********************************'
write(*,*)
! TDA for W
write(*,*) 'Tamm-Dancoff approximation by default!'
write(*,*)
! Dimension of the supermatrix
n1h = nO
n1p = nV
n2h = nO*(nO-1)/2
n2p = nV*(nV-1)/2
n1h1p = n1h*n1p
n3h1p = n2h*n1h1p
n3p1h = n2p*n1h1p
nH = n2h + n3h1p
! Memory allocation
allocate(order(nH),H(nH,nH),X(nH,nH),OmBSE(nH),Z(nH))
! Initialization
H(:,:) = 0d0
!----------------------------------------!
! Compute BSE supermatrix !
!----------------------------------------!
! !
! | D -M1 -M1 -M2 -M2 | !
! | | !
! | +M1 E1 0 0 0 | !
! | | !
! H = | +M1 0 E2 0 0 | !
! | | !
! | +M2 0 0 E3 0 | !
! | | !
! | +M2 0 0 0 E4 | !
! !
!----------------------------------------!
!---------!
! Block D !
!---------!
ij = 0
do i=nC+1,nO
do j=i+1,nO
ij = ij + 1
kl = 0
do k=nC+1,nO
do l=k+1,nO
kl = kl + 1
H(ij,kl) = - (eGW(i) + eGW(j))*Kronecker_delta(i,k)*Kronecker_delta(j,l) &
+ (ERI(i,j,k,l) - ERI(i,j,l,k))
end do
end do
end do
end do
!----------------!
! Blocks M1 & M2 !
!----------------!
ijm = 0
do i=nC+1,nO
do j=i+1,nO
do m=1,nS
ijm = ijm + 1
kl = 0
do k=nC+1,nO
do l=k+1,nO
kl = kl + 1
tmp1 = Kronecker_delta(j,l)*rho(i,k,m)
tmp2 = Kronecker_delta(j,k)*rho(i,l,m)
tmp3 = Kronecker_delta(i,l)*rho(j,k,m)
tmp4 = Kronecker_delta(i,k)*rho(j,l,m)
H(n2h+0*n3h1p+ijm,kl ) = tmp1 - tmp2
H(kl ,n2h+0*n3h1p+ijm) = tmp3 - tmp4
! H(n2h+1*n3h1p+ijm,kl ) = +tmp4
! H(kl ,n2h+1*n3h1p+ijm) = +tmp2
!
! H(n2h+2*n3h1p+ijm,kl ) = +tmp1
! H(kl ,n2h+2*n3h1p+ijm) = +tmp4
! H(n2h+3*n3h1p+ijm,kl ) = +tmp3
! H(kl ,n2h+3*n3h1p+ijm) = +tmp1
end do
end do
end do
end do
end do
!------------!
! Block 3h1p !
!------------!
ijm = 0
do i=nC+1,nO
do j=i+1,nO
do m=1,nS
ijm = ijm + 1
tmp = - eGW(i) - eGW(j) + Om(m)
H(n2h+0*n3h1p+ijm,n2h+0*n3h1p+ijm) = tmp
! H(n2h+1*n3h1p+ijm,n2h+1*n3h1p+ijm) = tmp
! H(n2h+2*n3h1p+ijm,n2h+2*n3h1p+ijm) = tmp
! H(n2h+3*n3h1p+ijm,n2h+3*n3h1p+ijm) = tmp
end do
end do
end do
!-------------------------!
! Diagonalize supermatrix !
!-------------------------!
call diagonalize_general_matrix(nH,H,OmBSE,X)
do s=1,nH
order(s) = s
end do
call quick_sort(OmBSE,order,nH)
call set_order(X,order,nH,nH)
!-----------------!
! Compute weights !
!-----------------!
Z(:) = 0d0
do s=1,nH
do ij=1,n2h
Z(s) = Z(s) + X(ij,s)**2
end do
end do
!--------------!
! Dump results !
!--------------!
write(*,*)'-------------------------------------------'
write(*,*)' Upfolded ppBSE excitation energies (eV) '
write(*,*)'-------------------------------------------'
write(*,'(1X,A1,1X,A3,1X,A1,1X,A15,1X,A1,1X,A15,1X,A1,1X,A15,1X)') &
'|','#','|','OmBSE (eV)','|','Z','|'
write(*,*)'-------------------------------------------'
do s=1,min(nH,maxH)
if(Z(s) > 1d-7) &
write(*,'(1X,A1,1X,I3,1X,A1,1X,F15.6,1X,A1,1X,F15.6,1X,A1,1X)') &
'|',s,'|',-OmBSE(s)*HaToeV,'|',Z(s),'|'
end do
write(*,*)'-------------------------------------------'
write(*,*)
end subroutine