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61 lines
1.3 KiB
Fortran
61 lines
1.3 KiB
Fortran
BEGIN_PROVIDER [ integer, nelec ]
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implicit none
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BEGIN_DOC
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! Number of electrons
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END_DOC
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nelec = 2
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END_PROVIDER
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BEGIN_PROVIDER [ double precision, elec_coord, (nelec, 3) ]
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implicit none
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BEGIN_DOC
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! Electron coordinates
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END_DOC
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integer :: i,j
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do j = 1 , 3
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do i = 1, nelec
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call random_number(elec_coord(i, j))
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enddo
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enddo
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END_PROVIDER
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BEGIN_PROVIDER [ double precision, elec_dist, (nelec, nelec) ]
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implicit none
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BEGIN_DOC
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! e-e distance
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END_DOC
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integer :: i,j
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double precision :: x,y,z
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do j = 1, nelec
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do i = 1, nelec
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x = elec_coord(i, 1) - elec_coord(j, 1)
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y = elec_coord(i, 2) - elec_coord(j, 2)
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z = elec_coord(i, 3) - elec_coord(j, 3)
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elec_dist(i, j) = dsqrt( x*x + y*y + z*z )
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enddo
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enddo
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END_PROVIDER
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BEGIN_PROVIDER [double precision, factor_ee]
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implicit none
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BEGIN_DOC
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! Electron-electron contribution to Jastrow factor
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END_DOC
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integer :: i, j
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double precision :: pow_ser = 0.0d0
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factor_ee = 0.0d0
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do j = 1 , nelec
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do i = 1, nelec
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do p = 2, nbord
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pow_ser = pow_ser + bord_vect(p + 1) * rescale_ee(i, j) ** p
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end do
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factor_ee = factor_ee + bord_vect(1) * rescale_ee(i, j) &
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/ (1 + bord_vect(2) * rescale_ee(i, j)) + pow_ser
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end do
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end do
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factor_ee = 0.5d0 * factor_ee
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END_PROVIDER
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