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quantum_package/plugins/CIS/super_ci.irp.f

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program cis
implicit none
integer :: i
call super_CI
end
subroutine super_CI
implicit none
double precision :: E, delta_E, delta_D, E_min
integer :: k
character :: save_char
call write_time(output_hartree_fock)
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write(output_hartree_fock,'(A4,X,A16, X, A16, X, A16 )') &
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'====','================','================','================'
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write(output_hartree_fock,'(A4,X,A16, X, A16, X, A16 )') &
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' N ', 'Energy ', 'Energy diff ', 'Save '
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write(output_hartree_fock,'(A4,X,A16, X, A16, X, A16 )') &
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'====','================','================','================'
E = HF_energy + 1.d0
delta_D = 0.d0
E_min = HF_energy
FREE psi_det psi_coef
call clear_mo_map
N_det = 1
SOFT_TOUCH N_det
mo_coef = eigenvectors_fock_matrix_mo
TOUCH mo_coef
do k=1,n_it_scf_max
delta_E = HF_energy - E
E = HF_energy
if (E < E_min) then
call save_mos
save_char = 'X'
else
save_char = ' '
endif
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E_min = min(E,E_min)
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write(output_hartree_fock,'(I4,X,F16.10, X, F16.10, X, A8 )') &
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k, E, delta_E, save_char
if ( (delta_E < 0.d0).and.(dabs(delta_E) < thresh_scf) ) then
exit
endif
call H_apply_cis
call diagonalize_CI
call set_natural_mos
FREE psi_det psi_coef
call clear_mo_map
N_det = 1
SOFT_TOUCH N_det
mo_coef = eigenvectors_fock_matrix_mo
TOUCH mo_coef
enddo
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write(output_hartree_fock,'(A4,X,A16, X, A16, X, A16 )') &
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'====','================','================','================'
call write_time(output_hartree_fock)
end