mirror of
https://github.com/LCPQ/quantum_package
synced 2024-11-03 20:54:00 +01:00
356 lines
11 KiB
Fortran
356 lines
11 KiB
Fortran
use omp_lib
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use bitmasks
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BEGIN_PROVIDER [ integer(omp_lock_kind), psi_ref_lock, (psi_det_size) ]
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implicit none
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BEGIN_DOC
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! Locks on ref determinants to fill delta_ij
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END_DOC
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integer :: i
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do i=1,psi_det_size
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call omp_init_lock( psi_ref_lock(i) )
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enddo
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END_PROVIDER
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subroutine create_minilist(key_mask, fullList, miniList, idx_miniList, N_fullList, N_miniList, Nint)
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use bitmasks
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implicit none
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integer(bit_kind), intent(in) :: fullList(Nint, 2, N_fullList)
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integer, intent(in) :: N_fullList
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integer(bit_kind),intent(out) :: miniList(Nint, 2, N_fullList)
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integer,intent(out) :: idx_miniList(N_fullList), N_miniList
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integer, intent(in) :: Nint
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integer(bit_kind) :: key_mask(Nint, 2)
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integer :: ni, i, n_a, n_b, e_a, e_b
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n_a = 0
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n_b = 0
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do ni=1,nint
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n_a = n_a + popcnt(key_mask(ni,1))
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n_b = n_b + popcnt(key_mask(ni,2))
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end do
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if(n_a == 0) then
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N_miniList = N_fullList
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miniList(:,:,:) = fullList(:,:,:)
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do i=1,N_fullList
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idx_miniList(i) = i
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end do
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return
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end if
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N_miniList = 0
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do i=1,N_fullList
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e_a = n_a
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e_b = n_b
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do ni=1,nint
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e_a -= popcnt(iand(fullList(ni, 1, i), key_mask(ni, 1)))
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e_b -= popcnt(iand(fullList(ni, 2, i), key_mask(ni, 2)))
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end do
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if(e_a + e_b <= 2) then
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N_miniList = N_miniList + 1
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miniList(:,:,N_miniList) = fullList(:,:,i)
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idx_miniList(N_miniList) = i
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end if
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end do
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end subroutine
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subroutine mrcc_dress(delta_ij_, delta_ii_, Ndet_ref, Ndet_non_ref,i_generator,n_selected,det_buffer,Nint,iproc,key_mask)
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use bitmasks
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implicit none
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integer, intent(in) :: i_generator,n_selected, Nint, iproc
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integer, intent(in) :: Ndet_ref, Ndet_non_ref
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double precision, intent(inout) :: delta_ij_(Ndet_ref,Ndet_non_ref,*)
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double precision, intent(inout) :: delta_ii_(Ndet_ref,*)
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integer(bit_kind), intent(in) :: det_buffer(Nint,2,n_selected)
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integer :: i,j,k,l
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integer :: degree_alpha(psi_det_size)
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integer :: idx_alpha(0:psi_det_size)
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logical :: good
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integer(bit_kind) :: tq(Nint,2,n_selected)
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integer :: N_tq, c_ref ,degree
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integer :: connected_to_ref
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double precision :: hIk, hla, hIl, dIk(N_states), dka(N_states), dIa(N_states)
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double precision, allocatable :: dIa_hla(:,:)
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double precision :: haj, phase, phase2
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double precision :: f(N_states), ci_inv(N_states)
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integer :: exc(0:2,2,2)
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integer :: h1,h2,p1,p2,s1,s2
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integer(bit_kind) :: tmp_det(Nint,2)
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integer :: iint, ipos
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integer :: i_state, k_sd, l_sd, i_I, i_alpha
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integer(bit_kind),allocatable :: miniList(:,:,:), supalist(:,:,:)
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integer(bit_kind),intent(in) :: key_mask(Nint, 2)
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integer,allocatable :: idx_miniList(:)
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integer :: N_miniList, N_supalist, ni, leng
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leng = max(N_det_generators, N_det_non_ref)
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allocate(miniList(Nint, 2, leng), idx_miniList(leng), supalist(Nint,2,leng))
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l = 0
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N_miniList = 0
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N_supalist = 0
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do ni = 1,Nint
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l += popcnt(key_mask(ni,1)) + popcnt(key_mask(ni,2))
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end do
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if(l == 0) then
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N_miniList = i_generator-1
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miniList(:,:,:N_miniList) = psi_det_generators(:,:,:N_minilist)
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else
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do i=i_generator-1,1,-1
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k = l
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do ni=1,nint
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k -= popcnt(iand(key_mask(ni,1), psi_det_generators(ni,1,i))) + popcnt(iand(key_mask(ni,2), psi_det_generators(ni,2,i)))
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end do
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! if(k == 0) then
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! deallocate(miniList, supalist, idx_miniList)
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! return
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! else if(k <= 2) then
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! N_minilist += 1
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! miniList(:,:,N_minilist) = psi_det_generators(:,:,i)
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! end if
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!
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if(k == 2) then
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N_supalist += 1
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supalist(:,:,N_supalist) = psi_det_generators(:,:,i)
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else if(k == 1) then
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N_minilist += 1
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miniList(:,:,N_minilist) = psi_det_generators(:,:,i)
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else if(k == 0) then
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deallocate(miniList, supalist, idx_miniList)
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return
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end if
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end do
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end if
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if(N_supalist > 0) then
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miniList(:,:,N_minilist+1:N_minilist+N_supalist) = supalist(:,:,:N_supalist)
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N_minilist = N_minilist + N_supalist
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end if
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call find_triples_and_quadruples(i_generator,n_selected,det_buffer,Nint,tq,N_tq,miniList,N_minilist)
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allocate (dIa_hla(N_states,Ndet_non_ref))
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! |I>
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! |alpha>
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if(N_tq > 0) then
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call create_minilist(key_mask, psi_non_ref, miniList, idx_miniList, N_det_non_ref, N_minilist, Nint)
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end if
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do i_alpha=1,N_tq
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! call get_excitation_degree_vector(psi_non_ref,tq(1,1,i_alpha),degree_alpha,Nint,N_det_non_ref,idx_alpha)
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call get_excitation_degree_vector(miniList,tq(1,1,i_alpha),degree_alpha,Nint,N_minilist,idx_alpha)
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do j=1,idx_alpha(0)
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idx_alpha(j) = idx_miniList(idx_alpha(j))
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end do
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! |I>
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do i_I=1,N_det_ref
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! Find triples and quadruple grand parents
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call get_excitation_degree(tq(1,1,i_alpha),psi_ref(1,1,i_I),degree,Nint)
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if (degree > 4) then
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cycle
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endif
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do i_state=1,N_states
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dIa(i_state) = 0.d0
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enddo
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! <I| <> |alpha>
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do k_sd=1,idx_alpha(0)
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call get_excitation_degree(psi_ref(1,1,i_I),psi_non_ref(1,1,idx_alpha(k_sd)),degree,Nint)
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if (degree > 2) then
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cycle
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endif
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! <I| /k\ |alpha>
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! <I|H|k>
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call i_h_j(psi_ref(1,1,i_I),psi_non_ref(1,1,idx_alpha(k_sd)),Nint,hIk)
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do i_state=1,N_states
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dIk(i_state) = hIk * lambda_mrcc(i_state,idx_alpha(k_sd))
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enddo
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! |l> = Exc(k -> alpha) |I>
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call get_excitation(psi_non_ref(1,1,idx_alpha(k_sd)),tq(1,1,i_alpha),exc,degree,phase,Nint)
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call decode_exc(exc,degree,h1,p1,h2,p2,s1,s2)
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do k=1,N_int
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tmp_det(k,1) = psi_ref(k,1,i_I)
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tmp_det(k,2) = psi_ref(k,2,i_I)
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enddo
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! Hole (see list_to_bitstring)
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iint = ishft(h1-1,-bit_kind_shift) + 1
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ipos = h1-ishft((iint-1),bit_kind_shift)-1
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tmp_det(iint,s1) = ibclr(tmp_det(iint,s1),ipos)
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! Particle
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iint = ishft(p1-1,-bit_kind_shift) + 1
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ipos = p1-ishft((iint-1),bit_kind_shift)-1
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tmp_det(iint,s1) = ibset(tmp_det(iint,s1),ipos)
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if (degree_alpha(k_sd) == 2) then
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! Hole (see list_to_bitstring)
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iint = ishft(h2-1,-bit_kind_shift) + 1
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ipos = h2-ishft((iint-1),bit_kind_shift)-1
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tmp_det(iint,s2) = ibclr(tmp_det(iint,s2),ipos)
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! Particle
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iint = ishft(p2-1,-bit_kind_shift) + 1
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ipos = p2-ishft((iint-1),bit_kind_shift)-1
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tmp_det(iint,s2) = ibset(tmp_det(iint,s2),ipos)
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endif
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! <I| \l/ |alpha>
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do i_state=1,N_states
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dka(i_state) = 0.d0
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enddo
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do l_sd=k_sd+1,idx_alpha(0)
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call get_excitation_degree(tmp_det,psi_non_ref(1,1,idx_alpha(l_sd)),degree,Nint)
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if (degree == 0) then
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call get_excitation(psi_ref(1,1,i_I),psi_non_ref(1,1,idx_alpha(l_sd)),exc,degree,phase2,Nint)
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call i_h_j(psi_ref(1,1,i_I),psi_non_ref(1,1,idx_alpha(l_sd)),Nint,hIl)
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do i_state=1,N_states
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dka(i_state) = hIl * lambda_mrcc(i_state,idx_alpha(l_sd)) * phase * phase2
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enddo
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exit
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endif
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enddo
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do i_state=1,N_states
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dIa(i_state) = dIa(i_state) + dIk(i_state) * dka(i_state)
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enddo
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enddo
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do i_state=1,N_states
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ci_inv(i_state) = 1.d0/psi_ref_coef(i_I,i_state)
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enddo
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do l_sd=1,idx_alpha(0)
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k_sd = idx_alpha(l_sd)
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call i_h_j(tq(1,1,i_alpha),psi_non_ref(1,1,idx_alpha(l_sd)),Nint,hla)
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do i_state=1,N_states
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dIa_hla(i_state,k_sd) = dIa(i_state) * hla
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enddo
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enddo
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call omp_set_lock( psi_ref_lock(i_I) )
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do l_sd=1,idx_alpha(0)
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k_sd = idx_alpha(l_sd)
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do i_state=1,N_states
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delta_ij_(i_I,k_sd,i_state) += dIa_hla(i_state,k_sd)
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if(dabs(psi_ref_coef(i_I,i_state)).ge.5.d-5)then
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delta_ii_(i_I,i_state) -= dIa_hla(i_state,k_sd) * ci_inv(i_state) * psi_non_ref_coef(k_sd,i_state)
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else
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delta_ii_(i_I,i_state) = 0.d0
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endif
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enddo
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enddo
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call omp_unset_lock( psi_ref_lock(i_I) )
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enddo
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enddo
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deallocate (dIa_hla)
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deallocate(miniList, idx_miniList)
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end
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BEGIN_PROVIDER [ integer(bit_kind), gen_det_sorted, (N_int,2,N_det_generators,2) ]
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&BEGIN_PROVIDER [ integer, gen_det_shortcut, (0:N_det_generators,2) ]
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&BEGIN_PROVIDER [ integer, gen_det_version, (N_int, N_det_generators,2) ]
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&BEGIN_PROVIDER [ integer, gen_det_idx, (N_det_generators,2) ]
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gen_det_sorted(:,:,:,1) = psi_det_generators(:,:,:N_det_generators)
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gen_det_sorted(:,:,:,2) = psi_det_generators(:,:,:N_det_generators)
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call sort_dets_ab_v(gen_det_sorted(:,:,:,1), gen_det_idx(:,1), gen_det_shortcut(0:,1), gen_det_version(:,:,1), N_det_generators, N_int)
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call sort_dets_ba_v(gen_det_sorted(:,:,:,2), gen_det_idx(:,2), gen_det_shortcut(0:,2), gen_det_version(:,:,2), N_det_generators, N_int)
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END_PROVIDER
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subroutine find_triples_and_quadruples(i_generator,n_selected,det_buffer,Nint,tq,N_tq,miniList,N_miniList)
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use bitmasks
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implicit none
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integer, intent(in) :: i_generator,n_selected, Nint
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integer(bit_kind), intent(in) :: det_buffer(Nint,2,n_selected)
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integer :: i,j,k,m
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logical :: is_in_wavefunction
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integer :: degree(psi_det_size)
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integer :: idx(0:psi_det_size)
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logical :: good
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integer(bit_kind), intent(out) :: tq(Nint,2,n_selected)
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integer, intent(out) :: N_tq
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integer :: nt,ni
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integer(bit_kind),intent(in) :: miniList(Nint,2,N_det_generators)
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integer,intent(in) :: N_miniList
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N_tq = 0
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i_loop : do i=1,N_selected
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do j=1,N_miniList
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nt = 0
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do ni=1,Nint
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nt += popcnt(xor(miniList(ni,1,j), det_buffer(ni,1,i))) + popcnt(xor(miniList(ni,2,j), det_buffer(ni,2,i)))
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end do
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if(nt <= 4) then
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cycle i_loop
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end if
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end do
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! if(connected_to_ref(det_buffer(1,1,i),psi_det_generators,Nint, &
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! i_generator,N_det_generators) /= 0) then
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! cycle i_loop
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! end if
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! Select determinants that are triple or quadruple excitations
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! from the ref
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good = .True.
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call get_excitation_degree_vector(psi_ref,det_buffer(1,1,i),degree,Nint,N_det_ref,idx)
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!good=(idx(0) == 0) tant que degree > 2 pas retourné par get_excitation_degree_vector
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do k=1,idx(0)
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if (degree(k) < 3) then
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good = .False.
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exit
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endif
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enddo
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if (good) then
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if (.not. is_in_wavefunction(det_buffer(1,1,i),Nint,N_det)) then
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N_tq += 1
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do k=1,N_int
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tq(k,1,N_tq) = det_buffer(k,1,i)
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tq(k,2,N_tq) = det_buffer(k,2,i)
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enddo
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endif
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endif
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enddo i_loop
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end
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