mirror of
https://github.com/QuantumPackage/qp2.git
synced 2024-12-23 12:55:37 +01:00
216 lines
6.5 KiB
Fortran
216 lines
6.5 KiB
Fortran
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use bitmasks
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subroutine copy_H_apply_buffer_to_wf_tc
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use omp_lib
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implicit none
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BEGIN_DOC
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! Copies the H_apply buffer to psi_coef.
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! After calling this subroutine, N_det, psi_det and psi_coef need to be touched
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END_DOC
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integer(bit_kind), allocatable :: buffer_det(:,:,:)
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double precision, allocatable :: buffer_r_coef(:,:), buffer_l_coef(:,:)
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integer :: i,j,k
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integer :: N_det_old
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PROVIDE H_apply_buffer_allocated
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ASSERT (N_int > 0)
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ASSERT (N_det > 0)
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allocate ( buffer_det(N_int,2,N_det), buffer_r_coef(N_det,N_states), buffer_l_coef(N_det,N_states) )
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! Backup determinants
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j=0
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do i=1,N_det
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! if (pruned(i)) cycle ! Pruned determinants
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j+=1
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ASSERT (sum(popcnt(psi_det(:,1,i))) == elec_alpha_num)
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ASSERT (sum(popcnt(psi_det(:,2,i))) == elec_beta_num)
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buffer_det(:,:,j) = psi_det(:,:,i)
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enddo
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N_det_old = j
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! Backup coefficients
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do k=1,N_states
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j=0
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do i=1,N_det
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! if (pruned(i)) cycle ! Pruned determinants
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j += 1
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buffer_r_coef(j,k) = psi_r_coef_bi_ortho(i,k)
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buffer_l_coef(j,k) = psi_l_coef_bi_ortho(i,k)
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enddo
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ASSERT ( j == N_det_old )
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enddo
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! Update N_det
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N_det = N_det_old
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do j=0,nproc-1
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N_det = N_det + H_apply_buffer(j)%N_det
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enddo
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! Update array sizes
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if (psi_det_size < N_det) then
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psi_det_size = N_det
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TOUCH psi_det_size
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endif
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! Restore backup in resized array
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do i=1,N_det_old
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psi_det(:,:,i) = buffer_det(:,:,i)
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ASSERT (sum(popcnt(psi_det(:,1,i))) == elec_alpha_num)
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ASSERT (sum(popcnt(psi_det(:,2,i))) == elec_beta_num )
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enddo
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do k=1,N_states
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do i=1,N_det_old
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psi_r_coef_bi_ortho(i,k) = buffer_r_coef(i,k)
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psi_l_coef_bi_ortho(i,k) = buffer_l_coef(i,k)
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enddo
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enddo
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! Copy new buffers
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!$OMP PARALLEL DEFAULT(SHARED) &
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!$OMP PRIVATE(j,k,i) FIRSTPRIVATE(N_det_old) &
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!$OMP SHARED(N_int,H_apply_buffer,psi_det,psi_r_coef_bi_ortho,psi_l_coef_bi_ortho,N_states,psi_det_size)
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j=0
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!$ j=omp_get_thread_num()
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do k=0,j-1
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N_det_old += H_apply_buffer(k)%N_det
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enddo
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do i=1,H_apply_buffer(j)%N_det
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do k=1,N_int
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psi_det(k,1,i+N_det_old) = H_apply_buffer(j)%det(k,1,i)
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psi_det(k,2,i+N_det_old) = H_apply_buffer(j)%det(k,2,i)
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enddo
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ASSERT (sum(popcnt(psi_det(:,1,i+N_det_old))) == elec_alpha_num)
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ASSERT (sum(popcnt(psi_det(:,2,i+N_det_old))) == elec_beta_num )
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enddo
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do k=1,N_states
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do i=1,H_apply_buffer(j)%N_det
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psi_r_coef_bi_ortho(i+N_det_old,k) = H_apply_buffer(j)%coef(i,k)
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psi_l_coef_bi_ortho(i+N_det_old,k) = 0.d0
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enddo
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enddo
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!$OMP BARRIER
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H_apply_buffer(j)%N_det = 0
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!$OMP END PARALLEL
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SOFT_TOUCH N_det psi_det psi_r_coef_bi_ortho psi_l_coef_bi_ortho
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logical :: found_duplicates
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call remove_duplicates_in_psi_det_tc(found_duplicates)
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call bi_normalize(psi_l_coef_bi_ortho,psi_r_coef_bi_ortho,N_det,size(psi_l_coef_bi_ortho,1),N_states)
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SOFT_TOUCH N_det psi_det psi_r_coef_bi_ortho psi_l_coef_bi_ortho
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end
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subroutine remove_duplicates_in_psi_det_tc(found_duplicates)
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implicit none
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logical, intent(out) :: found_duplicates
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BEGIN_DOC
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! Removes duplicate determinants in the wave function.
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END_DOC
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integer :: i,j,k
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integer(bit_kind), allocatable :: bit_tmp(:)
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logical,allocatable :: duplicate(:)
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logical :: dup
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allocate (duplicate(N_det), bit_tmp(N_det))
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found_duplicates = .False.
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!$OMP PARALLEL DEFAULT(SHARED) PRIVATE(i,j,k,dup)
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!$OMP DO
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do i=1,N_det
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integer, external :: det_search_key
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!$DIR FORCEINLINE
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bit_tmp(i) = det_search_key(psi_det_sorted_bit_tc(1,1,i),N_int)
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duplicate(i) = .False.
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enddo
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!$OMP END DO
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!$OMP DO schedule(dynamic,1024)
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do i=1,N_det-1
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if (duplicate(i)) then
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cycle
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endif
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j = i+1
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do while (bit_tmp(j)==bit_tmp(i))
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if (duplicate(j)) then
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j = j+1
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if (j > N_det) then
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exit
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else
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cycle
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endif
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endif
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dup = .True.
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do k=1,N_int
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if ( (psi_det_sorted_bit_tc(k,1,i) /= psi_det_sorted_bit_tc(k,1,j) ) &
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.or. (psi_det_sorted_bit_tc(k,2,i) /= psi_det_sorted_bit_tc(k,2,j) ) ) then
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dup = .False.
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exit
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endif
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enddo
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if (dup) then
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duplicate(j) = .True.
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found_duplicates = .True.
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endif
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j += 1
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if (j > N_det) then
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exit
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endif
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enddo
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enddo
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!$OMP END DO
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!$OMP END PARALLEL
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if (found_duplicates) then
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k=0
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do i=1,N_det
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if (.not.duplicate(i)) then
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k += 1
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psi_det(:,:,k) = psi_det_sorted_bit_tc (:,:,i)
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psi_r_coef_bi_ortho(k,:) = psi_r_coef_sorted_bit(i,:)
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psi_l_coef_bi_ortho(k,:) = psi_l_coef_sorted_bit(i,:)
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else
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if (sum(abs(psi_r_coef_sorted_bit(i,:))) /= 0.d0 ) then
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psi_r_coef_bi_ortho(k,:) = psi_r_coef_sorted_bit(i,:)
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psi_l_coef_bi_ortho(k,:) = psi_l_coef_sorted_bit(i,:)
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endif
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endif
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enddo
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N_det = k
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psi_det_sorted_bit_tc(:,:,1:N_det) = psi_det(:,:,1:N_det)
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psi_r_coef_sorted_bit(1:N_det,:) = psi_r_coef_bi_ortho(1:N_det,:)
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psi_l_coef_sorted_bit(1:N_det,:) = psi_l_coef_bi_ortho(1:N_det,:)
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TOUCH N_det psi_det psi_det_sorted_bit_tc c0_weight psi_r_coef_sorted_bit psi_l_coef_sorted_bit
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endif
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psi_det = psi_det_sorted_tc
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psi_r_coef_bi_ortho = psi_r_coef_sorted_bi_ortho
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psi_l_coef_bi_ortho = psi_l_coef_sorted_bi_ortho
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SOFT_TOUCH psi_det psi_r_coef_bi_ortho psi_l_coef_bi_ortho psi_det_sorted_bit_tc psi_r_coef_sorted_bit psi_l_coef_sorted_bit
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deallocate (duplicate,bit_tmp)
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end
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BEGIN_PROVIDER [ integer(bit_kind), psi_det_sorted_bit_tc, (N_int,2,psi_det_size) ]
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&BEGIN_PROVIDER [ double precision, psi_r_coef_sorted_bit, (N_det,N_states) ]
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&BEGIN_PROVIDER [ double precision, psi_l_coef_sorted_bit, (N_det,N_states) ]
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implicit none
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BEGIN_DOC
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! Determinants on which we apply $\langle i|H|psi \rangle$ for perturbation.
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! They are sorted by determinants interpreted as integers. Useful
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! to accelerate the search of a random determinant in the wave
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! function.
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END_DOC
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call sort_dets_by_det_search_key(N_det, psi_det, psi_r_coef_bi_ortho, size(psi_r_coef_bi_ortho,1), &
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psi_det_sorted_bit_tc, psi_r_coef_sorted_bit, N_states)
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call sort_dets_by_det_search_key(N_det, psi_det, psi_l_coef_bi_ortho, size(psi_l_coef_bi_ortho,1), &
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psi_det_sorted_bit_tc, psi_l_coef_sorted_bit, N_states)
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END_PROVIDER
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