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38 lines
1.5 KiB
Fortran
38 lines
1.5 KiB
Fortran
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BEGIN_PROVIDER [double precision, short_range_Hartree_operator, (mo_num,mo_num,N_states)]
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&BEGIN_PROVIDER [double precision, short_range_Hartree, (N_states)]
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implicit none
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BEGIN_DOC
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! short_range_Hartree_operator(i,j) = $\int dr i(r)j(r) \int r' \rho(r') W_{ee}^{sr}$
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!
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! short_range_Hartree = $1/2 \sum_{i,j} \rho_{ij} \mathtt{short_range_Hartree_operator}(i,j)$
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!
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! = $1/2 \int dr \int r' \rho(r) \rho(r') W_{ee}^{sr}$
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END_DOC
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integer :: i,j,k,l,m,n,istate
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double precision :: get_two_e_integral,get_mo_two_e_integral_erf
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double precision :: integral, integral_erf, contrib
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double precision :: integrals_array(mo_num,mo_num),integrals_erf_array(mo_num,mo_num)
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short_range_Hartree_operator = 0.d0
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short_range_Hartree = 0.d0
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do i = 1, mo_num
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do j = 1, mo_num
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if(dabs(one_e_dm_average_mo_for_dft(j,i)).le.1.d-12)cycle
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call get_mo_two_e_integrals_i1j1(i,j,mo_num,integrals_array,mo_integrals_map)
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call get_mo_two_e_integrals_erf_i1j1(i,j,mo_num,integrals_erf_array,mo_integrals_erf_map)
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do istate = 1, N_states
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do k = 1, mo_num
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do l = 1, mo_num
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integral = integrals_array(l,k)
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integral_erf = integrals_erf_array(l,k)
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contrib = one_e_dm_mo_for_dft(i,j,istate) * (integral - integral_erf)
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short_range_Hartree_operator(l,k,istate) += contrib
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short_range_Hartree(istate) += contrib * one_e_dm_mo_for_dft(k,l,istate)
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enddo
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enddo
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enddo
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enddo
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enddo
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short_range_Hartree = short_range_Hartree * 0.5d0
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print*, 'short_range_Hartree',short_range_Hartree
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END_PROVIDER
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