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quantum_package/plugins/MRPT_Utils/new_way.irp.f
Anthony Scemama d00c312361 Moved MRPT_Utils
2016-11-30 17:02:28 +01:00

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subroutine give_2h1p_contrib(matrix_2h1p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_2h1p(N_det,N_det,*)
integer :: i,j,r,a,b
integer :: iorb, jorb, rorb, aorb, borb
integer :: ispin,jspin
integer :: idet,jdet
integer(bit_kind) :: perturb_dets(N_int,2,n_act_orb,2,2)
double precision :: perturb_dets_phase(n_act_orb,2,2)
double precision :: perturb_dets_hij(n_act_orb,2,2)
double precision :: coef_perturb_from_idet(n_act_orb,2,2,N_states)
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: active_int(n_act_orb,2)
double precision :: hij,phase
!matrix_2h1p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do j = 1, n_inact_orb ! Second inactive
jorb = list_inact(j)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
! take all the integral you will need for i,j,r fixed
do a = 1, n_act_orb
aorb = list_act(a)
active_int(a,1) = get_mo_bielec_integral(iorb,jorb,rorb,aorb,mo_integrals_map) ! direct
active_int(a,2) = get_mo_bielec_integral(iorb,jorb,aorb,rorb,mo_integrals_map) ! exchange
enddo
integer :: degree(N_det)
integer :: idx(0:N_det)
double precision :: delta_e(n_act_orb,2,N_states)
integer :: istate
integer :: index_orb_act_mono(N_det,3)
do idet = 1, N_det
call get_excitation_degree_vector_mono(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do jspin = 1, 2 ! spin of the couple z-a^dagger (j,a)
if(ispin == jspin .and. iorb.le.jorb)cycle ! condition not to double count
do a = 1, n_act_orb ! First active
aorb = list_act(a)
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation inactive -- > virtual
call clear_bit_to_integer(iorb,det_tmp(1,ispin),N_int) ! hole in "iorb" of spin Ispin
call set_bit_to_integer(rorb,det_tmp(1,ispin),N_int) ! particle in "rorb" of spin Ispin
! Do the excitation inactive -- > active
call clear_bit_to_integer(jorb,det_tmp(1,jspin),N_int) ! hole in "jorb" of spin Jspin
call set_bit_to_integer(aorb,det_tmp(1,jspin),N_int) ! particle in "aorb" of spin Jspin
! Check if the excitation is possible or not on psi_det(idet)
accu_elec= 0
do inint = 1, N_int
accu_elec+= popcnt(det_tmp(inint,jspin))
enddo
if(accu_elec .ne. elec_num_tab_local(jspin))then
perturb_dets_phase(a,jspin,ispin) = 0.0
perturb_dets_hij(a,jspin,ispin) = 0.d0
do istate = 1, N_states
coef_perturb_from_idet(a,jspin,ispin,istate) = 0.d0
enddo
cycle
endif
do inint = 1, N_int
perturb_dets(inint,1,a,jspin,ispin) = det_tmp(inint,1)
perturb_dets(inint,2,a,jspin,ispin) = det_tmp(inint,2)
enddo
call get_double_excitation(psi_det(1,1,idet),det_tmp,exc,phase,N_int)
perturb_dets_phase(a,jspin,ispin) = phase
do istate = 1, N_states
delta_e(a,jspin,istate) = one_creat(a,jspin,istate) &
- fock_virt_total_spin_trace(rorb,istate) &
+ fock_core_inactive_total_spin_trace(iorb,istate) &
+ fock_core_inactive_total_spin_trace(jorb,istate)
enddo
if(ispin == jspin)then
perturb_dets_hij(a,jspin,ispin) = phase * (active_int(a,2) - active_int(a,1) )
else
perturb_dets_hij(a,jspin,ispin) = phase * active_int(a,1)
endif
!!!!!!!!!!!!!!!!!!!!!1 Computation of the coefficient at first order coming from idet
!!!!!!!!!!!!!!!!!!!!! for the excitation (i,j)(ispin,jspin) ---> (r,a)(ispin,jspin)
do istate = 1, N_states
coef_perturb_from_idet(a,jspin,ispin,istate) = perturb_dets_hij(a,jspin,ispin) / delta_e(a,jspin,istate)
enddo
enddo
enddo
enddo
!!!!!!!!!!!!!!!!!!!!!!!!!!! determination of the connections between I and the other J determinants mono excited in the CAS
!!!!!!!!!!!!!!!!!!!!!!!!!!!! the determinants I and J must be connected by the following operator
!!!!!!!!!!!!!!!!!!!!!!!!!!!! <Jdet | a_{b} a^{\dagger}_a | Idet>
do jdet = 1, idx(0)
if(idx(jdet).ne.idet)then
call get_mono_excitation(psi_det(1,1,idet),psi_det(1,1,idx(jdet)),exc,phase,N_int)
if (exc(0,1,1) == 1) then
! Mono alpha
index_orb_act_mono(idx(jdet),1) = list_act_reverse(exc(1,2,1)) !!! a^{\dagger}_a
index_orb_act_mono(idx(jdet),2) = list_act_reverse(exc(1,1,1)) !!! a_{b}
index_orb_act_mono(idx(jdet),3) = 1
else
! Mono beta
index_orb_act_mono(idx(jdet),1) = list_act_reverse(exc(1,2,2)) !!! a^{\dagger}_a
index_orb_act_mono(idx(jdet),2) = list_act_reverse(exc(1,1,2)) !!! a_{b}
index_orb_act_mono(idx(jdet),3) = 2
endif
else
index_orb_act_mono(idx(jdet),1) = -1
endif
enddo
integer :: kspin
do jdet = 1, idx(0)
if(idx(jdet).ne.idet)then
! two determinants | Idet > and | Jdet > which are connected throw a mono excitation operator
! are connected by the presence of the perturbers determinants |det_tmp>
aorb = index_orb_act_mono(idx(jdet),1) ! a^{\dagger}_{aorb}
borb = index_orb_act_mono(idx(jdet),2) ! a_{borb}
kspin = index_orb_act_mono(idx(jdet),3) ! spin of the excitation
! the determinants Idet and Jdet interact throw the following operator
! | Jdet > = a_{borb,kspin} a^{\dagger}_{aorb, kspin} | Idet >
do ispin = 1, 2 ! you loop on all possible spin for the excitation
! a^{\dagger}_r a_{i} (ispin)
if(ispin == kspin .and. iorb.le.jorb)cycle ! condition not to double count
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{aorb,kspin} a_{jorb,kspin} a_{iorb,ispin} | Idet >
do inint = 1, N_int
det_tmp(inint,1) = perturb_dets(inint,1,aorb,kspin,ispin)
det_tmp(inint,2) = perturb_dets(inint,2,aorb,kspin,ispin)
enddo
double precision :: hja
! you determine the interaction between the excited determinant and the other parent | Jdet >
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{borb,kspin} a_{jorb,kspin} a_{iorb,ispin} | Jdet >
! hja = < det_tmp | H | Jdet >
call get_double_excitation(psi_det(1,1,idx(jdet)),det_tmp,exc,phase,N_int)
if(kspin == ispin)then
hja = phase * (active_int(borb,2) - active_int(borb,1) )
else
hja = phase * active_int(borb,1)
endif
do istate = 1, N_states
matrix_2h1p(idx(jdet),idet,istate) += hja * coef_perturb_from_idet(aorb,kspin,ispin,istate)
enddo
enddo ! ispin
else
! diagonal part of the dressing : interaction of | Idet > with all the perturbers generated by the excitations
!
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{aorb,kspin} a_{jorb,kspin} a_{iorb,ispin} | Idet >
do ispin = 1, 2
do kspin = 1, 2
if(ispin == kspin .and. iorb.le.jorb)cycle ! condition not to double count
do a = 1, n_act_orb ! First active
do istate = 1, N_states
matrix_2h1p(idet,idet,istate) += coef_perturb_from_idet(a,kspin,ispin,istate) * perturb_dets_hij(a,kspin,ispin)
enddo
enddo
enddo
enddo
endif
enddo
enddo
enddo
enddo
enddo
end
subroutine give_1h2p_contrib(matrix_1h2p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_1h2p(N_det,N_det,*)
integer :: i,v,r,a,b
integer :: iorb, vorb, rorb, aorb, borb
integer :: ispin,jspin
integer :: idet,jdet
integer(bit_kind) :: perturb_dets(N_int,2,n_act_orb,2,2)
double precision :: perturb_dets_phase(n_act_orb,2,2)
double precision :: perturb_dets_hij(n_act_orb,2,2)
double precision :: coef_perturb_from_idet(n_act_orb,2,2,N_states)
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: active_int(n_act_orb,2)
double precision :: hij,phase
!matrix_1h2p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do v = 1, n_virt_orb ! First virtual
vorb = list_virt(v)
do r = 1, n_virt_orb ! Second virtual
rorb = list_virt(r)
! take all the integral you will need for i,j,r fixed
do a = 1, n_act_orb
aorb = list_act(a)
active_int(a,1) = get_mo_bielec_integral(iorb,aorb,rorb,vorb,mo_integrals_map) ! direct
active_int(a,2) = get_mo_bielec_integral(iorb,aorb,vorb,rorb,mo_integrals_map) ! exchange
enddo
integer :: degree(N_det)
integer :: idx(0:N_det)
double precision :: delta_e(n_act_orb,2,N_states)
integer :: istate
integer :: index_orb_act_mono(N_det,3)
do idet = 1, N_det
call get_excitation_degree_vector_mono(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
do ispin = 1, 2 ! spin of the couple a-a^dagger (iorb,rorb)
do jspin = 1, 2 ! spin of the couple a-a^dagger (aorb,vorb)
do a = 1, n_act_orb ! First active
aorb = list_act(a)
if(ispin == jspin .and. vorb.le.rorb)cycle ! condition not to double count
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation inactive -- > virtual
call clear_bit_to_integer(iorb,det_tmp(1,ispin),N_int) ! hole in "iorb" of spin Ispin
call set_bit_to_integer(rorb,det_tmp(1,ispin),N_int) ! particle in "rorb" of spin Ispin
! Do the excitation active -- > virtual
call clear_bit_to_integer(aorb,det_tmp(1,jspin),N_int) ! hole in "aorb" of spin Jspin
call set_bit_to_integer(vorb,det_tmp(1,jspin),N_int) ! particle in "vorb" of spin Jspin
! Check if the excitation is possible or not on psi_det(idet)
accu_elec= 0
do inint = 1, N_int
accu_elec+= popcnt(det_tmp(inint,jspin))
enddo
if(accu_elec .ne. elec_num_tab_local(jspin))then
perturb_dets_phase(a,jspin,ispin) = 0.0
perturb_dets_hij(a,jspin,ispin) = 0.d0
do istate = 1, N_states
coef_perturb_from_idet(a,jspin,ispin,istate) = 0.d0
enddo
cycle
endif
do inint = 1, N_int
perturb_dets(inint,1,a,jspin,ispin) = det_tmp(inint,1)
perturb_dets(inint,2,a,jspin,ispin) = det_tmp(inint,2)
enddo
do inint = 1, N_int
det_tmp(inint,1) = perturb_dets(inint,1,a,jspin,ispin)
det_tmp(inint,2) = perturb_dets(inint,2,a,jspin,ispin)
enddo
call get_double_excitation(psi_det(1,1,idet),det_tmp,exc,phase,N_int)
perturb_dets_phase(a,jspin,ispin) = phase
do istate = 1, N_states
delta_e(a,jspin,istate) = one_anhil(a,jspin,istate) &
- fock_virt_total_spin_trace(rorb,istate) &
- fock_virt_total_spin_trace(vorb,istate) &
+ fock_core_inactive_total_spin_trace(iorb,istate)
enddo
if(ispin == jspin)then
perturb_dets_hij(a,jspin,ispin) = phase * (active_int(a,1) - active_int(a,2) )
else
perturb_dets_hij(a,jspin,ispin) = phase * active_int(a,1)
endif
!!!!!!!!!!!!!!!!!!!!!1 Computation of the coefficient at first order coming from idet
!!!!!!!!!!!!!!!!!!!!! for the excitation (i,j)(ispin,jspin) ---> (r,a)(ispin,jspin)
do istate = 1, N_states
coef_perturb_from_idet(a,jspin,ispin,istate) = perturb_dets_hij(a,jspin,ispin) / delta_e(a,jspin,istate)
enddo
enddo
enddo
enddo
!!!!!!!!!!!!!!!!!!!!!!!!!!! determination of the connections between I and the other J determinants mono excited in the CAS
!!!!!!!!!!!!!!!!!!!!!!!!!!!! the determinants I and J must be connected by the following operator
!!!!!!!!!!!!!!!!!!!!!!!!!!!! <Jdet | a^{\dagger}_b a_{a} | Idet>
do jdet = 1, idx(0)
if(idx(jdet).ne.idet)then
call get_mono_excitation(psi_det(1,1,idet),psi_det(1,1,idx(jdet)),exc,phase,N_int)
if (exc(0,1,1) == 1) then
! Mono alpha
index_orb_act_mono(idx(jdet),1) = list_act_reverse(exc(1,1,1)) !!! a_a
index_orb_act_mono(idx(jdet),2) = list_act_reverse(exc(1,2,1)) !!! a^{\dagger}_{b}
index_orb_act_mono(idx(jdet),3) = 1
else
! Mono beta
index_orb_act_mono(idx(jdet),1) = list_act_reverse(exc(1,1,2)) !!! a_a
index_orb_act_mono(idx(jdet),2) = list_act_reverse(exc(1,2,2)) !!! a^{\dagger}_{b}
index_orb_act_mono(idx(jdet),3) = 2
endif
else
index_orb_act_mono(idx(jdet),1) = -1
endif
enddo
integer :: kspin
do jdet = 1, idx(0)
if(idx(jdet).ne.idet)then
! two determinants | Idet > and | Jdet > which are connected throw a mono excitation operator
! are connected by the presence of the perturbers determinants |det_tmp>
aorb = index_orb_act_mono(idx(jdet),1) ! a_{aorb}
borb = index_orb_act_mono(idx(jdet),2) ! a^{\dagger}_{borb}
kspin = index_orb_act_mono(idx(jdet),3) ! spin of the excitation
! the determinants Idet and Jdet interact throw the following operator
! | Jdet > = a^{\dagger}_{borb,kspin} a_{aorb, kspin} | Idet >
do ispin = 1, 2 ! you loop on all possible spin for the excitation
! a^{\dagger}_r a_{i} (ispin)
if(ispin == kspin .and. vorb.le.rorb)cycle ! condition not to double count
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{vorb,kspin} a_{aorb,kspin} a_{iorb,ispin} | Idet >
do inint = 1, N_int
det_tmp(inint,1) = perturb_dets(inint,1,aorb,kspin,ispin)
det_tmp(inint,2) = perturb_dets(inint,2,aorb,kspin,ispin)
enddo
double precision :: hja
! you determine the interaction between the excited determinant and the other parent | Jdet >
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{vorb,kspin} a_{borb,kspin} a_{iorb,ispin} | Jdet >
! hja = < det_tmp | H | Jdet >
call get_double_excitation(psi_det(1,1,idx(jdet)),det_tmp,exc,phase,N_int)
if(kspin == ispin)then
hja = phase * (active_int(borb,1) - active_int(borb,2) )
else
hja = phase * active_int(borb,1)
endif
do istate = 1, N_states
matrix_1h2p(idx(jdet),idet,istate) += hja * coef_perturb_from_idet(aorb,kspin,ispin,istate)
enddo
enddo ! ispin
else
! diagonal part of the dressing : interaction of | Idet > with all the perturbers generated by the excitations
!
! | det_tmp > = a^{\dagger}_{rorb,ispin} a^{\dagger}_{vorb,kspin} a_{aorb,kspin} a_{iorb,ispin} | Idet >
do ispin = 1, 2
do kspin = 1, 2
do a = 1, n_act_orb ! First active
aorb = list_act(a)
if(ispin == kspin .and. vorb.le.rorb)cycle ! condition not to double count
do istate = 1, N_states
matrix_1h2p(idet,idet,istate) += coef_perturb_from_idet(a,kspin,ispin,istate) * perturb_dets_hij(a,kspin,ispin)
enddo
enddo
enddo
enddo
endif
enddo
enddo
enddo
enddo
enddo
end
subroutine give_1h1p_contrib(matrix_1h1p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_1h1p(N_det,N_det,*)
integer :: i,j,r,a,b
integer :: iorb, jorb, rorb, aorb, borb
integer :: ispin,jspin
integer :: idet,jdet
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: active_int(n_act_orb,2)
double precision :: hij,phase
integer :: degree(N_det)
integer :: idx(0:N_det)
integer :: istate
double precision :: hja,delta_e_inact_virt(N_states)
integer :: kspin,degree_scalar
!matrix_1h1p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do j = 1, N_states
delta_e_inact_virt(j) = fock_core_inactive_total_spin_trace(iorb,j) &
- fock_virt_total_spin_trace(rorb,j)
enddo
do idet = 1, N_det
call get_excitation_degree_vector_mono(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Case of the mono excitations
do jdet = 1, idx(0)
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation inactive -- > virtual
double precision :: himono,delta_e(N_states),coef_mono(N_states)
call clear_bit_to_integer(iorb,det_tmp(1,ispin),N_int) ! hole in "iorb" of spin Ispin
call set_bit_to_integer(rorb,det_tmp(1,ispin),N_int) ! particle in "rorb" of spin Ispin
call i_H_j(psi_det(1,1,idet),det_tmp,N_int,himono)
do state_target = 1, N_states
! delta_e(state_target) = one_anhil_one_creat_inact_virt(i,r,state_target) + delta_e_inact_virt(state_target)
delta_e(state_target) = one_anhil_one_creat_inact_virt_bis(i,r,idet,state_target)
coef_mono(state_target) = himono / delta_e(state_target)
enddo
if(idx(jdet).ne.idet)then
call get_mono_excitation(psi_det(1,1,idet),psi_det(1,1,idx(jdet)),exc,phase,N_int)
if (exc(0,1,1) == 1) then
! Mono alpha
aorb = (exc(1,2,1)) !!! a^{\dagger}_a
borb = (exc(1,1,1)) !!! a_{b}
jspin = 1
else
! Mono beta
aorb = (exc(1,2,2)) !!! a^{\dagger}_a
borb = (exc(1,1,2)) !!! a_{b}
jspin = 2
endif
call get_excitation_degree(psi_det(1,1,idx(jdet)),det_tmp,degree_scalar,N_int)
if(degree_scalar .ne. 2)then
print*, 'pb !!!'
print*, degree_scalar
call debug_det(psi_det(1,1,idx(jdet)),N_int)
call debug_det(det_tmp,N_int)
stop
endif
call get_double_excitation(psi_det(1,1,idx(jdet)),det_tmp,exc,phase,N_int)
if(ispin == jspin )then
hij = -get_mo_bielec_integral(iorb,aorb,rorb,borb,mo_integrals_map) &
+ get_mo_bielec_integral(iorb,aorb,borb,rorb,mo_integrals_map)
else
hij = get_mo_bielec_integral(iorb,borb,rorb,aorb,mo_integrals_map)
endif
hij = hij * phase
double precision :: hij_test
integer :: state_target
call i_H_j(psi_det(1,1,idx(jdet)),det_tmp,N_int,hij_test)
if(dabs(hij - hij_test).gt.1.d-10)then
print*, 'ahah pb !!'
print*, 'hij .ne. hij_test'
print*, hij,hij_test
call debug_det(psi_det(1,1,idx(jdet)),N_int)
call debug_det(det_tmp,N_int)
print*, ispin, jspin
print*,iorb,borb,rorb,aorb
print*, phase
call i_H_j_verbose(psi_det(1,1,idx(jdet)),det_tmp,N_int,hij_test)
stop
endif
do state_target = 1, N_states
matrix_1h1p(idx(jdet),idet,state_target) += hij* coef_mono(state_target)
enddo
else
do state_target = 1, N_states
matrix_1h1p(idet,idet,state_target) += himono * coef_mono(state_target)
enddo
endif
enddo
enddo
enddo
enddo
enddo
end
subroutine give_1h1p_sec_order_singles_contrib(matrix_1h1p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_1h1p(N_det,N_det,*)
integer :: i,j,r,a,b
integer :: iorb, jorb, rorb, aorb, borb,s,sorb
integer :: ispin,jspin
integer :: idet,jdet
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2),det_tmp_bis(N_int,2)
integer(bit_kind) :: det_pert(N_int,2,n_inact_orb,n_virt_orb,2)
double precision :: coef_det_pert(n_inact_orb,n_virt_orb,2,N_states,2)
double precision :: delta_e_det_pert(n_inact_orb,n_virt_orb,2,N_states)
double precision :: hij_det_pert(n_inact_orb,n_virt_orb,2,N_states)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: active_int(n_act_orb,2)
double precision :: hij,phase
integer :: degree(N_det)
integer :: idx(0:N_det)
integer :: istate
double precision :: hja,delta_e_inact_virt(N_states)
integer :: kspin,degree_scalar
!matrix_1h1p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
double precision :: himono,delta_e(N_states),coef_mono(N_states)
integer :: state_target
do idet = 1, N_det
call get_excitation_degree_vector_mono(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do state_target = 1, N_states
coef_det_pert(i,r,ispin,state_target,1) = 0.d0
coef_det_pert(i,r,ispin,state_target,2) = 0.d0
enddo
do j = 1, N_states
delta_e_inact_virt(j) = fock_core_inactive_total_spin_trace(iorb,j) &
- fock_virt_total_spin_trace(rorb,j)
enddo
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation inactive -- > virtual
call clear_bit_to_integer(iorb,det_tmp(1,ispin),N_int) ! hole in "iorb" of spin Ispin
call set_bit_to_integer(rorb,det_tmp(1,ispin),N_int) ! particle in "rorb" of spin Ispin
call i_H_j(psi_det(1,1,idet),det_tmp,N_int,himono)
do inint = 1, N_int
det_pert(inint,1,i,r,ispin) = det_tmp(inint,1)
det_pert(inint,2,i,r,ispin) = det_tmp(inint,2)
enddo
do state_target = 1, N_states
delta_e_det_pert(i,r,ispin,state_target) = one_anhil_one_creat_inact_virt(i,r,state_target) + delta_e_inact_virt(state_target)
coef_det_pert(i,r,ispin,state_target,1) = himono / delta_e_det_pert(i,r,ispin,state_target)
enddo
!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Case of the mono excitations
enddo ! ispin
enddo ! rorb
enddo ! iorb
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do inint = 1, N_int
det_tmp(inint,1) = det_pert(inint,1,i,r,ispin)
det_tmp(inint,2) = det_pert(inint,2,i,r,ispin)
enddo
do j = 1, n_inact_orb ! First inactive
jorb = list_inact(j)
do s = 1, n_virt_orb ! First virtual
sorb = list_virt(s)
do jspin = 1, 2 ! spin of the couple a-a^dagger (i,r)
if(i==j.and.r==s.and.ispin==jspin)cycle
do inint = 1, N_int
det_tmp_bis(inint,1) = det_pert(inint,1,j,s,jspin)
det_tmp_bis(inint,2) = det_pert(inint,2,j,s,jspin)
enddo
call i_H_j(det_tmp_bis,det_tmp,N_int,himono)
do state_target = 1, N_states
coef_det_pert(i,r,ispin,state_target,2) += &
coef_det_pert(j,s,jspin,state_target,1) * himono / delta_e_det_pert(i,r,ispin,state_target)
enddo
enddo
enddo
enddo
enddo ! ispin
enddo ! rorb
enddo ! iorb
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do state_target = 1, N_states
coef_det_pert(i,r,ispin,state_target,1) += coef_det_pert(i,r,ispin,state_target,2)
enddo
do inint = 1, N_int
det_tmp(inint,1) = det_pert(inint,1,i,r,ispin)
det_tmp(inint,2) = det_pert(inint,2,i,r,ispin)
enddo
do jdet = 1, idx(0)
!
if(idx(jdet).ne.idet)then
call get_mono_excitation(psi_det(1,1,idet),psi_det(1,1,idx(jdet)),exc,phase,N_int)
if (exc(0,1,1) == 1) then
! Mono alpha
aorb = (exc(1,2,1)) !!! a^{\dagger}_a
borb = (exc(1,1,1)) !!! a_{b}
jspin = 1
else
aorb = (exc(1,2,2)) !!! a^{\dagger}_a
borb = (exc(1,1,2)) !!! a_{b}
jspin = 2
endif
call get_excitation_degree(psi_det(1,1,idx(jdet)),det_tmp,degree_scalar,N_int)
if(degree_scalar .ne. 2)then
print*, 'pb !!!'
print*, degree_scalar
call debug_det(psi_det(1,1,idx(jdet)),N_int)
call debug_det(det_tmp,N_int)
stop
endif
call get_double_excitation(psi_det(1,1,idx(jdet)),det_tmp,exc,phase,N_int)
double precision :: hij_test
hij_test = 0.d0
call i_H_j(psi_det(1,1,idx(jdet)),det_tmp,N_int,hij_test)
do state_target = 1, N_states
matrix_1h1p(idx(jdet),idet,state_target) += hij_test* coef_det_pert(i,r,ispin,state_target,2)
enddo
else
hij_test = 0.d0
call i_H_j(psi_det(1,1,idet),det_tmp,N_int,hij_test)
do state_target = 1, N_states
matrix_1h1p(idet,idet,state_target) += hij_test* coef_det_pert(i,r,ispin,state_target,2)
enddo
endif
enddo
enddo
enddo
enddo
enddo ! idet
end
subroutine give_1p_sec_order_singles_contrib(matrix_1p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_1p(N_det,N_det,*)
integer :: i,j,r,a,b
integer :: iorb, jorb, rorb, aorb, borb,s,sorb
integer :: ispin,jspin
integer :: idet,jdet
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2),det_tmp_bis(N_int,2)
integer(bit_kind) :: det_pert(N_int,2,n_act_orb,n_virt_orb,2)
double precision :: coef_det_pert(n_act_orb,n_virt_orb,2,N_states,2)
double precision :: delta_e_det_pert(n_act_orb,n_virt_orb,2,N_states)
double precision :: hij_det_pert(n_act_orb,n_virt_orb,2)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: hij,phase
integer :: degree(N_det)
integer :: idx(0:N_det)
integer :: istate
double precision :: hja,delta_e_act_virt(N_states)
integer :: kspin,degree_scalar
!matrix_1p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
double precision :: himono,delta_e(N_states),coef_mono(N_states)
integer :: state_target
do idet = 1, N_det
call get_excitation_degree_vector_mono(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
do i = 1, n_act_orb ! First active
iorb = list_act(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
do state_target = 1, N_states
coef_det_pert(i,r,ispin,state_target,1) = 0.d0
coef_det_pert(i,r,ispin,state_target,2) = 0.d0
enddo
do j = 1, N_states
delta_e_act_virt(j) = - fock_virt_total_spin_trace(rorb,j)
enddo
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation active -- > virtual
call do_mono_excitation(det_tmp,iorb,rorb,ispin,i_ok)
integer :: i_ok
if(i_ok .ne.1)then
do state_target = 1, N_states
coef_det_pert(i,r,ispin,state_target,1) = -1.d+10
coef_det_pert(i,r,ispin,state_target,2) = -1.d+10
hij_det_pert(i,r,ispin) = 0.d0
enddo
do inint = 1, N_int
det_pert(inint,1,i,r,ispin) = 0_bit_kind
det_pert(inint,2,i,r,ispin) = 0_bit_kind
enddo
cycle
endif
call i_H_j(psi_det(1,1,idet),det_tmp,N_int,himono)
do inint = 1, N_int
det_pert(inint,1,i,r,ispin) = det_tmp(inint,1)
det_pert(inint,2,i,r,ispin) = det_tmp(inint,2)
enddo
do state_target = 1, N_states
delta_e_det_pert(i,r,ispin,state_target) = one_creat_virt(i,r,state_target) + delta_e_act_virt(state_target)
coef_det_pert(i,r,ispin,state_target,1) = himono / delta_e_det_pert(i,r,ispin,state_target)
hij_det_pert(i,r,ispin) = himono
enddo
!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Case of the mono excitations
enddo ! ispin
enddo ! rorb
enddo ! iorb
! do i = 1, n_act_orb ! First active
! do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
! if(coef_det_pert(i,1,ispin,1,1) == -1.d+10)cycle
! iorb = list_act(i)
! do r = 1, n_virt_orb ! First virtual
! rorb = list_virt(r)
! do inint = 1, N_int
! det_tmp(inint,1) = det_pert(inint,1,i,r,ispin)
! det_tmp(inint,2) = det_pert(inint,2,i,r,ispin)
! enddo
! do j = 1, n_act_orb ! First active
! do jspin = 1, 2 ! spin of the couple a-a^dagger (i,r)
! if(coef_det_pert(j,1,jspin,1,1) == -1.d+10)cycle
! jorb = list_act(j)
! do s = 1, n_virt_orb ! First virtual
! sorb = list_virt(s)
! if(i==j.and.r==s.and.ispin==jspin)cycle
! do inint = 1, N_int
! det_tmp_bis(inint,1) = det_pert(inint,1,j,s,jspin)
! det_tmp_bis(inint,2) = det_pert(inint,2,j,s,jspin)
! enddo
! call i_H_j(det_tmp_bis,det_tmp,N_int,himono)
! do state_target = 1, N_states
! coef_det_pert(i,r,ispin,state_target,2) += &
! coef_det_pert(j,s,jspin,state_target,1) * himono / delta_e_det_pert(i,r,ispin,state_target)
! enddo
! enddo
! enddo
! enddo
! enddo ! ispin
! enddo ! rorb
! enddo ! iorb
do i = 1, n_act_orb ! First active
do ispin = 1, 2 ! spin of the couple a-a^dagger (i,r)
if(coef_det_pert(i,1,ispin,1,1) == -1.d+10)cycle
iorb = list_act(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
! do state_target = 1, N_states
! coef_det_pert(i,r,ispin,state_target,1) += coef_det_pert(i,r,ispin,state_target,2)
! enddo
do inint = 1, N_int
det_tmp(inint,1) = det_pert(inint,1,i,r,ispin)
det_tmp(inint,2) = det_pert(inint,2,i,r,ispin)
enddo
do jdet = 1,N_det
double precision :: coef_array(N_states),hij_test
call i_H_j(det_tmp,psi_det(1,1,jdet),N_int,himono)
call get_delta_e_dyall(psi_det(1,1,jdet),det_tmp,coef_array,hij_test,delta_e)
do state_target = 1, N_states
! matrix_1p(idet,jdet,state_target) += himono * coef_det_pert(i,r,ispin,state_target,1)
matrix_1p(idet,jdet,state_target) += himono * hij_det_pert(i,r,ispin) / delta_e(state_target)
enddo
enddo
enddo
enddo
enddo
enddo ! idet
end
subroutine give_1h1p_only_doubles_spin_cross(matrix_1h1p)
use bitmasks
implicit none
double precision , intent(inout) :: matrix_1h1p(N_det,N_det,*)
integer :: i,j,r,a,b
integer :: iorb, jorb, rorb, aorb, borb
integer :: ispin,jspin
integer :: idet,jdet
integer :: inint
integer :: elec_num_tab_local(2),acu_elec
integer(bit_kind) :: det_tmp(N_int,2)
integer :: exc(0:2,2,2)
integer :: accu_elec
double precision :: get_mo_bielec_integral
double precision :: active_int(n_act_orb,2)
double precision :: hij,phase
integer :: degree(N_det)
integer :: idx(0:N_det)
integer :: istate
double precision :: hja,delta_e_inact_virt(N_states)
integer(bit_kind) :: pert_det(N_int,2,n_act_orb,n_act_orb,2)
double precision :: pert_det_coef(n_act_orb,n_act_orb,2,N_states)
integer :: kspin,degree_scalar
integer :: other_spin(2)
other_spin(1) = 2
other_spin(2) = 1
double precision :: hidouble,delta_e(N_states)
!matrix_1h1p = 0.d0
elec_num_tab_local = 0
do inint = 1, N_int
elec_num_tab_local(1) += popcnt(psi_det(inint,1,1))
elec_num_tab_local(2) += popcnt(psi_det(inint,2,1))
enddo
do i = 1, n_inact_orb ! First inactive
iorb = list_inact(i)
do r = 1, n_virt_orb ! First virtual
rorb = list_virt(r)
do j = 1, N_states
delta_e_inact_virt(j) = fock_core_inactive_total_spin_trace(iorb,j) &
- fock_virt_total_spin_trace(rorb,j)
enddo
do idet = 1, N_det
call get_excitation_degree_vector_double_alpha_beta(psi_det,psi_det(1,1,idet),degree,N_int,N_det,idx)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precomputation of matrix elements
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Case of the mono excitations
do ispin = 1, 2
jspin = other_spin(ispin)
do a = 1, n_act_orb
aorb = list_act(a)
do b = 1, n_act_orb
borb = list_act(b)
do inint = 1, N_int
det_tmp(inint,1) = psi_det(inint,1,idet)
det_tmp(inint,2) = psi_det(inint,2,idet)
enddo
! Do the excitation (i-->a)(ispin) + (b-->r)(other_spin(ispin))
integer :: i_ok,corb,dorb
call do_mono_excitation(det_tmp,iorb,aorb,ispin,i_ok)
if(i_ok .ne. 1)then
do state_target = 1, N_states
pert_det_coef(a,b,ispin,state_target) = -100000.d0
enddo
do inint = 1, N_int
pert_det(inint,1,a,b,ispin) = 0_bit_kind
pert_det(inint,2,a,b,ispin) = 0_bit_kind
enddo
cycle
endif
call do_mono_excitation(det_tmp,borb,rorb,jspin,i_ok)
if(i_ok .ne. 1)then
do state_target = 1, N_states
pert_det_coef(a,b,ispin,state_target) = -100000.d0
enddo
do inint = 1, N_int
pert_det(inint,1,a,b,ispin) = 0_bit_kind
pert_det(inint,2,a,b,ispin) = 0_bit_kind
enddo
cycle
endif
do inint = 1, N_int
pert_det(inint,1,a,b,ispin) = det_tmp(inint,1)
pert_det(inint,2,a,b,ispin) = det_tmp(inint,2)
enddo
call i_H_j(psi_det(1,1,idet),det_tmp,N_int,hidouble)
do state_target = 1, N_states
delta_e(state_target) = one_anhil_one_creat(a,b,ispin,jspin,state_target) + delta_e_inact_virt(state_target)
pert_det_coef(a,b,ispin,state_target) = hidouble / delta_e(state_target)
matrix_1h1p(idet,idet,state_target) += hidouble * pert_det_coef(a,b,ispin,state_target)
enddo
enddo
enddo
enddo
do jdet = 1, idx(0)
if(idx(jdet).ne.idet)then
call get_double_excitation(psi_det(1,1,idet),psi_det(1,1,idx(jdet)),exc,phase,N_int)
integer :: c,d,state_target
integer(bit_kind) :: det_tmp_bis(N_int,2)
! excitation from I --> J
! (a->c) (alpha) + (b->d) (beta)
aorb = exc(1,1,1)
corb = exc(1,2,1)
c = list_act_reverse(corb)
borb = exc(1,1,2)
dorb = exc(1,2,2)
d = list_act_reverse(dorb)
ispin = 1
jspin = 2
do inint = 1, N_int
det_tmp(inint,1) = pert_det(inint,1,c,d,1)
det_tmp(inint,2) = pert_det(inint,2,c,d,1)
det_tmp_bis(inint,1) = pert_det(inint,1,c,d,2)
det_tmp_bis(inint,2) = pert_det(inint,2,c,d,2)
enddo
double precision :: hjdouble_1,hjdouble_2
call i_H_j(psi_det(1,1,idx(jdet)),det_tmp,N_int,hjdouble_1)
call i_H_j(psi_det(1,1,idx(jdet)),det_tmp_bis,N_int,hjdouble_2)
do state_target = 1, N_states
matrix_1h1p(idx(jdet),idet,state_target) += (pert_det_coef(c,d,1,state_target) * hjdouble_1 + pert_det_coef(c,d,2,state_target) * hjdouble_2 )
enddo
endif
enddo
enddo
enddo
enddo
end
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