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quantum_package/plugins/QMC/qmc_e_curve.irp.f
Anthony Scemama f3b2bea214 Merged QMC modules (#208)
* Fixed mmap

* Truncated wf a la QMC=Chem

* Merged QmcChem and qmcpack modules
2017-07-12 23:58:45 +02:00

114 lines
3.6 KiB
Fortran

program e_curve
use bitmasks
implicit none
integer :: i,j,k, kk, nab, m, l
double precision :: norm, E, hij, num, ci, cj
integer, allocatable :: iorder(:)
double precision , allocatable :: norm_sort(:)
double precision :: e_0(N_states)
PROVIDE mo_bielec_integrals_in_map
nab = n_det_alpha_unique+n_det_beta_unique
allocate ( norm_sort(0:nab), iorder(0:nab) )
double precision, allocatable :: u_t(:,:), v_t(:,:), s_t(:,:)
double precision, allocatable :: u_0(:,:), v_0(:,:)
allocate(u_t(N_states,N_det),v_t(N_states,N_det),s_t(N_states,N_det))
allocate(u_0(N_states,N_det),v_0(N_states,N_det))
norm_sort(0) = 0.d0
iorder(0) = 0
do i=1,n_det_alpha_unique
norm_sort(i) = det_alpha_norm(i)
iorder(i) = i
enddo
do i=1,n_det_beta_unique
norm_sort(i+n_det_alpha_unique) = det_beta_norm(i)
iorder(i+n_det_alpha_unique) = -i
enddo
call dsort(norm_sort(1),iorder(1),nab)
if (.not.read_wf) then
stop 'Please set read_wf to true'
endif
PROVIDE psi_bilinear_matrix_values nuclear_repulsion
print *, ''
print *, '=============================='
print *, 'Energies at different cut-offs'
print *, '=============================='
print *, ''
print *, '=========================================================='
print '(A8,2X,A8,2X,A12,2X,A10,2X,A12)', 'Thresh.', 'Ndet', 'Cost', 'Norm', 'E'
print *, '=========================================================='
double precision :: thresh
integer(bit_kind), allocatable :: det_i(:,:), det_j(:,:)
thresh = 1.d-10
do j=0,nab
i = iorder(j)
if (i<0) then
do k=1,n_det
if (psi_bilinear_matrix_columns(k) == -i) then
psi_bilinear_matrix_values(k,1) = 0.d0
endif
enddo
else
do k=1,n_det
if (psi_bilinear_matrix_rows(k) == i) then
psi_bilinear_matrix_values(k,1) = 0.d0
endif
enddo
endif
if (thresh > norm_sort(j)) then
cycle
endif
u_0 = psi_bilinear_matrix_values(1:N_det,1:N_states)
v_t = 0.d0
s_t = 0.d0
call dtranspose( &
u_0, &
size(u_0, 1), &
u_t, &
size(u_t, 1), &
N_det, N_states)
call H_S2_u_0_nstates_openmp_work(v_t,s_t,u_t,N_states,N_det,1,N_det,0,1)
call dtranspose( &
v_t, &
size(v_t, 1), &
v_0, &
size(v_0, 1), &
N_states, N_det)
double precision, external :: u_dot_u, u_dot_v
do i=1,N_states
e_0(i) = u_dot_v(v_t(1,i),u_0(1,i),N_det)/u_dot_u(u_0(1,i),N_det)
enddo
m = 0
do k=1,n_det
if (psi_bilinear_matrix_values(k,1) /= 0.d0) then
m = m+1
endif
enddo
if (m == 0) then
exit
endif
E = E_0(1) + nuclear_repulsion
norm = u_dot_u(u_0(1,1),N_det)
print '(E9.1,2X,I8,2X,F10.2,2X,F10.8,2X,F12.6)', thresh, m, &
dble( elec_alpha_num**3 + elec_alpha_num**2 * (nab-1) ) / &
dble( elec_alpha_num**3 + elec_alpha_num**2 * (j-1)), norm, E
thresh = thresh * dsqrt(10.d0)
enddo
print *, '=========================================================='
deallocate (iorder, norm_sort)
end