mirror of
https://github.com/LCPQ/quantum_package
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68 lines
2.0 KiB
Fortran
68 lines
2.0 KiB
Fortran
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program test_two_bod
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implicit none
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read_wf = .True.
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touch read_wf
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call routine
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end
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subroutine routine
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implicit none
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integer :: i,j,k,l
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double precision :: accu,get_two_body_dm_ab_map_element,get_mo_bielec_integral_schwartz
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accu = 0.d0
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! Diag part of the two body dm
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do i = 1, n_act_orb
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do j = 1, n_act_orb
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accu += two_body_dm_ab_diag(i,j) * mo_bielec_integral_jj(i,j)
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enddo
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enddo
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print*,'BI ELECTRONIC = ',accu
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double precision :: accu_extra_diag
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accu_extra_diag = 0.d0
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do l = 1, n_act_orb ! p2
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do k = 1, n_act_orb ! h2
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do j = 1, n_act_orb ! p1
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do i = 1,n_act_orb ! h1
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accu_extra_diag += two_body_dm_ab_big_array(i,j,k,l) * get_mo_bielec_integral_schwartz(i,k,j,l,mo_integrals_map)
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enddo
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enddo
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enddo
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enddo
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print*,'extra_diag = ',accu_extra_diag
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double precision :: average_mono
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call get_average(mo_mono_elec_integral,one_body_dm_mo,average_mono)
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print*,'BI ELECTRONIC = ',accu+accu_extra_diag
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print*,'MONO ELECTRONIC = ',average_mono
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print*,'Total elec = ',accu+average_mono + accu_extra_diag
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print*,'Total = ',accu+average_mono+nuclear_repulsion +accu_extra_diag
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double precision :: e_0,hij
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call u0_H_u_0(e_0,psi_coef,n_det,psi_det,N_int)
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print*,'<Psi| H |Psi> = ',e_0 + nuclear_repulsion
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integer :: degree
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integer :: exc(0:2,2,2)
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integer :: h1,h2,p1,p2,s1,s2
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double precision :: phase
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integer :: n_elements
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n_elements = 0
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accu = 0.d0
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do i = 1, N_det
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do j = i+1, N_det
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call get_excitation_degree(psi_det(1,1,i),psi_det(1,1,j),degree,N_int)
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if(degree.gt.2)cycle
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! if(degree.ne.1)cycle
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call get_excitation(psi_det(1,1,i),psi_det(1,1,j),exc,degree,phase,N_int)
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call decode_exc(exc,degree,h1,p1,h2,p2,s1,s2)
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if(s1.eq.s2)cycle
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n_elements += 1
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call i_H_j(psi_det(1,1,i),psi_det(1,1,j),N_int,hij)
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accu += 2.d0 * hij * psi_coef(i,1) * psi_coef(j,1)
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enddo
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enddo
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print*,'n_elements = ',n_elements
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print*,'<Psi| extra diag ',accu
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print*,'dm ',accu_extra_diag
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end
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