diff --git a/src/CISD_SC2_selected/README.rst b/src/CISD_SC2_selected/README.rst index e8bb9563..b6206850 100644 --- a/src/CISD_SC2_selected/README.rst +++ b/src/CISD_SC2_selected/README.rst @@ -23,7 +23,7 @@ Needed Modules * `BiInts `_ * `Bitmask `_ * `CISD `_ -* `CISD_SC2 `_ +* `SC2 `_ * `CISD_selected `_ * `Dets `_ * `Electrons `_ diff --git a/src/SC2/SC2.irp.f b/src/Dets/SC2.irp.f similarity index 100% rename from src/SC2/SC2.irp.f rename to src/Dets/SC2.irp.f diff --git a/src/SC2/diagonalize_CI_SC2.irp.f b/src/Dets/diagonalize_CI_SC2.irp.f similarity index 100% rename from src/SC2/diagonalize_CI_SC2.irp.f rename to src/Dets/diagonalize_CI_SC2.irp.f diff --git a/src/SC2/README.rst b/src/SC2/README.rst index 96e489ed..30269d2d 100644 --- a/src/SC2/README.rst +++ b/src/SC2/README.rst @@ -8,7 +8,7 @@ Documentation .. Do not edit this section. It was auto-generated from the .. NEEDED_MODULES file. -`cisd_sc2 `_ +`cisd_sc2 `_ CISD+SC2 method :: take off all the disconnected terms of a CISD (selected or not) .br dets_in : bitmasks corresponding to determinants @@ -24,25 +24,51 @@ Documentation .br Initial guess vectors are not necessarily orthonormal -`repeat_excitation `_ +`repeat_excitation `_ Undocumented -`cisd `_ +`cisd `_ Undocumented -`ci_sc2_eigenvectors `_ +`ci_sc2_eigenvectors `_ Eigenvectors/values of the CI matrix -`ci_sc2_electronic_energy `_ +`ci_sc2_electronic_energy `_ Eigenvectors/values of the CI matrix -`ci_sc2_energy `_ +`ci_sc2_energy `_ N_states lowest eigenvalues of the CI matrix -`diagonalize_ci_sc2 `_ +`diagonalize_ci_sc2 `_ Replace the coefficients of the CI states by the coefficients of the eigenstates of the CI matrix +`pt2_epstein_nesbet_sc2_projected `_ + compute the Epstein-Nesbet perturbative first order coefficient and second order energetic contribution + .br + for the various N_st states, + .br + but with the correction in the denominator + .br + comming from the interaction of that determinant with all the others determinants + .br + that can be repeated by repeating all the double excitations + .br + : you repeat all the correlation energy already taken into account in CI_electronic_energy(1) + .br + that could be repeated to this determinant. + .br + In addition, for the perturbative energetic contribution you have the standard second order + .br + e_2_pert = ^2/(Delta_E) + .br + and also the purely projected contribution + .br + H_pert_diag = c_pert + +`repeat_all_e_corr `_ + Undocumented + Needed Modules diff --git a/src/SC2/pert_sc2.irp.f b/src/SC2/pert_sc2.irp.f deleted file mode 100644 index 15b81377..00000000 --- a/src/SC2/pert_sc2.irp.f +++ /dev/null @@ -1,109 +0,0 @@ - -subroutine pt2_epstein_nesbet_SC2_projected(det_pert,c_pert,e_2_pert,H_pert_diag,Nint,ndet,N_st) - use bitmasks - implicit none - integer, intent(in) :: Nint,ndet,N_st - integer(bit_kind), intent(in) :: det_pert(Nint,2) - double precision , intent(out) :: c_pert(N_st),e_2_pert(N_st),H_pert_diag(N_st) - double precision :: i_H_psi_array(N_st) - integer :: idx_repeat(0:ndet) - - BEGIN_DOC - ! compute the Epstein-Nesbet perturbative first order coefficient and second order energetic contribution - ! - ! for the various N_st states, - ! - ! but with the correction in the denominator - ! - ! comming from the interaction of that determinant with all the others determinants - ! - ! that can be repeated by repeating all the double excitations - ! - ! : you repeat all the correlation energy already taken into account in CI_electronic_energy(1) - ! - ! that could be repeated to this determinant. - ! - ! In addition, for the perturbative energetic contribution you have the standard second order - ! - ! e_2_pert = ^2/(Delta_E) - ! - ! and also the purely projected contribution - ! - ! H_pert_diag = c_pert - END_DOC - - integer :: i,j,degree - double precision :: diag_H_mat_elem,accu_e_corr,hij,h0j,h,delta_E - double precision :: repeat_all_e_corr,accu_e_corr_tmp,e_2_pert_fonda - ASSERT (Nint == N_int) - ASSERT (Nint > 0) - call i_H_psi_SC2(det_pert,psi_selectors,psi_selectors_coef,Nint,N_det_selectors,psi_selectors_size,N_st,i_H_psi_array,idx_repeat) - accu_e_corr = 0.d0 - call i_H_j(ref_bitmask,det_pert,Nint,h0j) - do i = 1, idx_repeat(0) - accu_e_corr = accu_e_corr + E_corr_per_selectors(idx_repeat(i)) - enddo - h = diag_H_mat_elem(det_pert,Nint) + accu_e_corr - - delta_E = (CI_SC2_electronic_energy(1) - h) - delta_E = 1.d0/delta_E - - c_pert(1) = i_H_psi_array(1) * delta_E - e_2_pert(1) = i_H_psi_array(1) * c_pert(1) - H_pert_diag(1) = c_pert(1) * h0j/coef_hf_selector - e_2_pert_fonda = H_pert_diag(1) - - do i =2,N_st - H_pert_diag(i) = h - if(CI_SC2_electronic_energy(i)>h.and.CI_SC2_electronic_energy(i).ne.0.d0)then - c_pert(i) = -1.d0 - e_2_pert(i) = -2.d0 - else if (dabs(CI_SC2_electronic_energy(i) - h) > 1.d-6) then - c_pert(i) = i_H_psi_array(i) / (CI_SC2_electronic_energy(i) - h) - e_2_pert(i) = c_pert(i) * i_H_psi_array(i) - else - c_pert(i) = -1.d0 - e_2_pert(i) = -dabs(i_H_psi_array(i)) - endif - enddo - - call get_excitation_degree(ref_bitmask,det_pert,degree,Nint) - if(degree==2)then - ! - do i = 1, N_st - do j = 1, idx_repeat(0) - e_2_pert(i) += e_2_pert_fonda * psi_selectors_coef(idx_repeat(j),i) * psi_selectors_coef(idx_repeat(j),i) - enddo - enddo - endif - -end - -double precision function repeat_all_e_corr(key_in) - implicit none - integer(bit_kind), intent(in) :: key_in(N_int,2) - integer :: i,degree - double precision :: accu - use bitmasks - accu = 0.d0 - call get_excitation_degree(key_in,ref_bitmask,degree,N_int) - if(degree==2)then - do i = 1, N_det_selectors - call get_excitation_degree(ref_bitmask,psi_selectors(1,1,i),degree,N_int) - if(degree.ne.2)cycle - call get_excitation_degree(key_in,psi_selectors(1,1,i),degree,N_int) - if (degree<=3)cycle - accu += E_corr_per_selectors(i) - enddo - elseif(degree==1)then - do i = 1, N_det_selectors - call get_excitation_degree(ref_bitmask,psi_selectors(1,1,i),degree,N_int) - if(degree.ne.2)cycle - call get_excitation_degree(key_in,psi_selectors(1,1,i),degree,N_int) - if (degree<=2)cycle - accu += E_corr_per_selectors(i) - enddo - endif - repeat_all_e_corr = accu - -end