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https://github.com/pfloos/quack
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53 lines
1.1 KiB
Fortran
53 lines
1.1 KiB
Fortran
subroutine lda_correlation_energy(DFA,nEns,wEns,nGrid,weight,rho,Ec)
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! Select the unrestrited version of the LDA correlation functional
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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) :: 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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double precision,intent(in) :: rho(nGrid,nspin)
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! Output variables
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double precision,intent(out) :: Ec(nsp)
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! Select correlation functional
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select case (DFA)
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case (1)
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call W38_lda_correlation_energy(nGrid,weight,rho,Ec)
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case (2)
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call PW92_lda_correlation_energy(nGrid,weight,rho,Ec)
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case (3)
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call VWN3_lda_correlation_energy(nGrid,weight,rho,Ec)
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case (4)
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call VWN5_lda_correlation_energy(nGrid,weight,rho,Ec)
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case (5)
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call C16_lda_correlation_energy(nGrid,weight,rho,Ec)
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case default
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call print_warning('!!! LDA correlation functional not available !!!')
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stop
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end select
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end subroutine lda_correlation_energy
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