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Added mo_energies as diff of expectation values of ionized wfs
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BEGIN_PROVIDER [ double precision, mo_energy_expval, (N_states,mo_tot_num,2,2)] | ||
use bitmasks | ||
implicit none | ||
BEGIN_DOC | ||
! Third index is spin. | ||
! Fourth index is 1:creation, 2:annihilation | ||
END_DOC | ||
integer :: i,j,k | ||
integer :: ispin, istate | ||
integer :: hp | ||
double precision :: norm_out(N_states) | ||
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integer, parameter :: hole_particle(2) = (/ -1, 1 /) | ||
double precision :: energies(n_states) | ||
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integer(bit_kind), allocatable :: psi_in_out(:,:,:) | ||
double precision, allocatable :: psi_in_out_coef(:,:) | ||
double precision :: E0(N_states), norm | ||
double precision, parameter :: t=1.d-3 | ||
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allocate (psi_in_out(N_int,2,N_det),psi_in_out_coef(N_det,N_states)) | ||
mo_energy_expval = 0.d0 | ||
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psi_in_out_coef(1:N_det,1:N_states) = psi_coef(1:N_det,1:N_states) | ||
psi_in_out(1:N_int,1:2,1:N_det) = psi_det(1:N_int,1:2,1:N_det) | ||
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! Truncate the wave function | ||
do istate=1,N_states | ||
norm = 0.d0 | ||
do k=1,N_det | ||
if (dabs(psi_in_out_coef(k,istate)) < t) then | ||
psi_in_out_coef(k,istate) = 0.d0 | ||
endif | ||
norm = norm + psi_in_out_coef(k,istate)*psi_in_out_coef(k,istate) | ||
enddo | ||
ASSERT (norm > 0.d0) | ||
norm = 1.d0/dsqrt(norm) | ||
psi_in_out_coef(1:N_det,istate) = psi_in_out_coef(1:N_det,istate) * norm | ||
call au0_h_au0(E0,psi_in_out,psi_in_out_coef,N_det,size(psi_in_out_coef,1)) | ||
enddo | ||
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do hp=1,2 | ||
do ispin=1,2 | ||
do i=1,mo_tot_num | ||
psi_in_out_coef(1:N_det,1:N_states) = psi_coef(1:N_det,1:N_states) | ||
psi_in_out(1:N_int,1:2,1:N_det) = psi_det(1:N_int,1:2,1:N_det) | ||
call apply_exc_to_psi(i,hole_particle(hp),ispin, & | ||
norm_out,psi_in_out,psi_in_out_coef, N_det,N_det,N_det,N_states) | ||
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! Truncate the wave function | ||
do istate=1,N_states | ||
norm = 0.d0 | ||
do k=1,N_det | ||
if (dabs(psi_in_out_coef(k,istate)) < t) then | ||
psi_in_out_coef(k,istate) = 0.d0 | ||
endif | ||
norm = norm + psi_in_out_coef(k,istate)*psi_in_out_coef(k,istate) | ||
enddo | ||
if (norm == 0.d0) then | ||
cycle | ||
endif | ||
norm = 1.d0/dsqrt(norm) | ||
psi_in_out_coef(1:N_det,istate) = psi_in_out_coef(1:N_det,istate) * norm | ||
enddo | ||
call au0_h_au0(energies,psi_in_out,psi_in_out_coef,N_det,size(psi_in_out_coef,1)) | ||
mo_energy_expval(1:N_states,i,ispin,hp) = energies(1:N_states) - E0(1:N_states) | ||
print *, i, ispin, real(energies(1)), real(E0(1)) | ||
enddo | ||
enddo | ||
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enddo | ||
mo_energy_expval(1:N_states,1:mo_tot_num,1:2,1) = -mo_energy_expval(1:N_states,1:mo_tot_num,1:2,1) | ||
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END_PROVIDER | ||
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subroutine au0_h_au0(energies,psi_in,psi_in_coef,ndet,dim_psi_coef) | ||
use bitmasks | ||
implicit none | ||
integer, intent(in) :: ndet,dim_psi_coef | ||
integer(bit_kind), intent(in) :: psi_in(N_int,2,Ndet) | ||
double precision, intent(in) :: psi_in_coef(dim_psi_coef,N_states) | ||
double precision, intent(out) :: energies(N_states) | ||
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integer :: i,j, istate | ||
double precision :: hij,accu | ||
double precision, allocatable :: psi_coef_tmp(:) | ||
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energies(1:N_states) = 0.d0 | ||
do i = 1, Ndet | ||
if(sum(dabs(psi_in_coef(i,1:N_states)))==0.d0) then | ||
cycle | ||
endif | ||
call diag_H_mat_elem_au0_h_au0(psi_in(1,1,i),N_int,hij) | ||
do istate=1,N_states | ||
energies(istate) += psi_in_coef(i,istate) * psi_in_coef(i,istate) * hij | ||
enddo | ||
do j = i+1, Ndet | ||
if(sum(dabs(psi_in_coef(j,1:N_states)))==0.d0) then | ||
cycle | ||
endif | ||
call i_H_j(psi_in(1,1,i),psi_in(1,1,j),N_int,hij) | ||
hij = hij+hij | ||
do istate=1,N_states | ||
energies(istate) = energies(istate) + psi_in_coef(i,istate) * psi_in_coef(j,istate) * hij | ||
enddo | ||
enddo | ||
enddo | ||
end | ||
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subroutine diag_H_mat_elem_au0_h_au0(det_in,Nint,hii) | ||
use bitmasks | ||
implicit none | ||
BEGIN_DOC | ||
! Computes <i|H|i> for any determinant i. Used for wave functions with an additional electron. | ||
END_DOC | ||
integer,intent(in) :: Nint | ||
integer(bit_kind),intent(in) :: det_in(Nint,2) | ||
double precision, intent(out) :: hii | ||
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integer :: i, j, iorb, jorb | ||
integer :: occ(Nint*bit_kind_size,2) | ||
integer :: elec_num_tab_local(2) | ||
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hii = 0.d0 | ||
call bitstring_to_list(det_in(1,1), occ(1,1), elec_num_tab_local(1), Nint) | ||
call bitstring_to_list(det_in(1,2), occ(1,2), elec_num_tab_local(2), Nint) | ||
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! alpha - alpha | ||
do i = 1, elec_num_tab_local(1) | ||
iorb = occ(i,1) | ||
hii += mo_mono_elec_integral(iorb,iorb) | ||
do j = i+1, elec_num_tab_local(1) | ||
jorb = occ(j,1) | ||
hii += mo_bielec_integral_jj_anti(jorb,iorb) | ||
enddo | ||
enddo | ||
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! beta - beta | ||
do i = 1, elec_num_tab_local(2) | ||
iorb = occ(i,2) | ||
hii += mo_mono_elec_integral(iorb,iorb) | ||
do j = i+1, elec_num_tab_local(2) | ||
jorb = occ(j,2) | ||
hii += mo_bielec_integral_jj_anti(jorb,iorb) | ||
enddo | ||
enddo | ||
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! alpha - beta | ||
do i = 1, elec_num_tab_local(2) | ||
iorb = occ(i,2) | ||
do j = 1, elec_num_tab_local(1) | ||
jorb = occ(j,1) | ||
hii += mo_bielec_integral_jj(jorb,iorb) | ||
enddo | ||
enddo | ||
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end |
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