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Print S2 in MRCC
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@ -298,6 +298,8 @@ BEGIN_PROVIDER [ double precision, CI_energy_dressed, (N_states_diag) ]
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call write_time(output_determinants)
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do j=1,N_states_diag
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CI_energy_dressed(j) = CI_electronic_energy_dressed(j) + nuclear_repulsion
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call write_double(output_determinants,CI_energy(j),'Energy of state '//trim(st))
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call write_double(output_determinants,CI_eigenvectors_s2(j),'S^2 of state '//trim(st))
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enddo
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END_PROVIDER
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@ -314,12 +314,7 @@ subroutine diagonalize_s2_betweenstates(keys_tmp,psi_coefs_inout,n,nmax_keys,nma
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enddo
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enddo
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!$OMP END PARALLEL DO
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print*,'Overlap matrix in the basis of the states considered'
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do i = 1, nstates
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write(*,'(10(F16.10,X))')overlap(i,:)
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enddo
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call ortho_lowdin(overlap,size(overlap,1),nstates,psi_coefs_inout,size(psi_coefs_inout,1),n)
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print*,'passed ortho'
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!$OMP PARALLEL DO COLLAPSE(2) DEFAULT(NONE) SCHEDULE(dynamic) &
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!$OMP PRIVATE(i,j) SHARED(overlap,psi_coefs_inout,nstates,n)
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@ -336,41 +331,49 @@ subroutine diagonalize_s2_betweenstates(keys_tmp,psi_coefs_inout,n,nmax_keys,nma
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enddo
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enddo
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!$OMP END PARALLEL DO
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print*,'Overlap matrix in the basis of the Lowdin orthonormalized states '
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do i = 1, nstates
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write(*,'(10(F16.10,X))')overlap(i,:)
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enddo
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call get_uJ_s2_uI(keys_tmp,psi_coefs_inout,n_det,size(psi_coefs_inout,1),size(keys_tmp,3),s2,nstates)
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print*,'S^2 matrix in the basis of the states considered'
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double precision :: accu_precision_diag,accu_precision_of_diag
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accu_precision_diag = 0.d0
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accu_precision_of_diag = 0.d0
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do i = 1, nstates
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do j = i+1, nstates
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! Do not combine states of the same spin symmetry
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if( dabs(s2(i,i) - s2(j,j)) .le.0.5d0) then
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s2(i,j) = 0.d0
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s2(j,i) = 0.d0
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endif
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enddo
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enddo
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do i = 1, nstates
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write(*,'(10(F10.6,X))')s2(i,:)
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s2(i,i) = s2(i,i)
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enddo
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print*,'Diagonalizing the S^2 matrix'
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double precision :: accu_precision_diag,accu_precision_of_diag
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accu_precision_diag = 0.d0
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accu_precision_of_diag = 0.d0
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do i = 1, nstates
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! Do not combine states of the same spin symmetry
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do j = i+1, nstates
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if( dabs(s2(i,i) - s2(j,j)) .le.0.5d0) then
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s2(i,j) = 0.d0
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s2(j,i) = 0.d0
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endif
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enddo
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! Do not rotate if the diagonal is correct
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if( dabs(s2(i,i) - expected_s2).le.5.d-3) then
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do j = 1, nstates
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if (j==i) cycle
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s2(i,j) = 0.d0
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s2(j,i) = 0.d0
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enddo
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endif
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enddo
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print*,'Modified S^2 matrix that will be diagonalized'
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do i = 1, nstates
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write(*,'(10(F10.6,X))')s2(i,:)
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s2(i,i) = s2(i,i)
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enddo
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allocate(eigvalues(nstates),eigvectors(nstates,nstates))
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call lapack_diagd(eigvalues,eigvectors,s2,nstates,nstates)
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print*,'Shifted Eigenvalues of s^2'
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print*,'Eigenvalues'
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do i = 1, nstates
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print*,'s2 = ',eigvalues(i)
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s2_eigvalues(i) = eigvalues(i)
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enddo
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print*,'Building the eigenvectors of the S^2 matrix'
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allocate(psi_coefs_tmp(nmax_coefs,nstates))
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psi_coefs_tmp = 0.d0
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do j = 1, nstates
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@ -386,7 +389,6 @@ subroutine diagonalize_s2_betweenstates(keys_tmp,psi_coefs_inout,n,nmax_keys,nma
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do i = 1, n_det
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accu += psi_coefs_tmp(i,j) * psi_coefs_tmp(i,j)
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enddo
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print*,'Norm of vector = ',accu
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accu = 1.d0/dsqrt(accu)
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do i = 1, n_det
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psi_coefs_inout(i,j) = psi_coefs_tmp(i,j) * accu
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