2020-03-16 23:28:56 +01:00
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subroutine exchange_individual_energy(rung,DFA,nEns,wEns,nGrid,weight,nBas, &
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ERI,P,FxHF,rhow,drhow,rho,drho,Ex)
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2020-03-16 22:08:04 +01:00
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2020-03-16 23:28:56 +01:00
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! Compute the exchange individual energy
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2020-03-16 22:08:04 +01:00
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implicit none
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include 'parameters.h'
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! Input variables
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integer,intent(in) :: rung
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character(len=12),intent(in) :: DFA
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integer,intent(in) :: nEns
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double precision,intent(in) :: wEns(nEns)
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integer,intent(in) :: nGrid
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double precision,intent(in) :: weight(nGrid)
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2020-03-16 23:28:56 +01:00
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integer,intent(in) :: nBas
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double precision,intent(in) :: ERI(nBas,nBas,nBas,nBas)
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double precision,intent(in) :: P(nBas,nBas)
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double precision,intent(in) :: FxHF(nBas,nBas)
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2020-03-16 22:08:04 +01:00
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double precision,intent(in) :: rhow(nGrid)
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double precision,intent(in) :: drhow(ncart,nGrid)
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double precision,intent(in) :: rho(nGrid)
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double precision,intent(in) :: drho(ncart,nGrid)
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! Local variables
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double precision :: ExLDA
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double precision :: ExHF
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! Output variables
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double precision,intent(out) :: Ex
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select case (rung)
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! Hartree calculation
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case(0)
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Ex = 0d0
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! LDA functionals
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case(1)
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2020-03-16 23:28:56 +01:00
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call lda_exchange_individual_energy(DFA,nEns,wEns,nGrid,weight,rhow,rho,ExLDA)
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Ex = ExLDA
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2020-03-16 22:08:04 +01:00
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! GGA functionals
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case(2)
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call print_warning('!!! Individual energies NYI for GGAs !!!')
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stop
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! Hybrid functionals
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case(4)
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2020-03-16 23:28:56 +01:00
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call print_warning('!!! Individual energies NYI for Hybrids !!!')
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2020-03-16 22:08:04 +01:00
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stop
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! Hartree-Fock calculation
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case(666)
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2020-03-16 23:28:56 +01:00
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call fock_exchange_potential(nBas,P,ERI,FxHF)
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call fock_exchange_energy(nBas,P,FxHF,ExHF)
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2020-03-16 22:08:04 +01:00
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Ex = ExHF
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end select
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end subroutine exchange_individual_energy
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