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quantum_package/plugins/MRCC_Utils/mrcc_general.irp.f
2016-03-30 21:33:38 +02:00

88 lines
2.8 KiB
Fortran

subroutine run_mrcc
implicit none
call set_generators_bitmasks_as_holes_and_particles
call mrcc_iterations
end
subroutine mrcc_iterations
implicit none
integer :: i,j
double precision :: E_new, E_old, delta_e
integer :: iteration,i_oscillations
double precision :: E_past(4), lambda
E_new = 0.d0
delta_E = 1.d0
iteration = 0
j = 1
i_oscillations = 0
lambda = 1.d0
do while (delta_E > 1.d-7)
iteration += 1
print *, '==========================='
print *, 'MRCC Iteration', iteration
print *, '==========================='
print *, ''
E_old = sum(ci_energy_dressed)
call write_double(6,ci_energy_dressed(1),"MRCC energy")
call diagonalize_ci_dressed(lambda)
E_new = sum(ci_energy_dressed)
delta_E = dabs(E_new - E_old)
! if (E_new > E_old) then
! lambda = lambda * 0.7d0
! else
! lambda = min(1.d0, lambda * 1.1d0)
! endif
! print *, 'energy lambda ', lambda
E_past(j) = E_new
j +=1
call save_wavefunction
if (iteration > 200) then
exit
endif
print*,'------------'
print*,'VECTOR'
do i = 1, N_det_ref
print*,''
print*,'psi_ref_coef(i,1) = ',psi_ref_coef(i,1)
print*,'delta_ii(i,1) = ',delta_ii(i,1)
enddo
print*,'------------'
enddo
call write_double(6,ci_energy_dressed(1),"Final MRCC energy")
call ezfio_set_mrcc_cassd_energy(ci_energy_dressed(1))
call save_wavefunction
end
subroutine set_generators_bitmasks_as_holes_and_particles
implicit none
integer :: i,k
do k = 1, N_generators_bitmask
do i = 1, N_int
! Pure single part
generators_bitmask(i,1,1,k) = holes_operators(i,1) ! holes for pure single exc alpha
generators_bitmask(i,1,2,k) = particles_operators(i,1) ! particles for pure single exc alpha
generators_bitmask(i,2,1,k) = holes_operators(i,2) ! holes for pure single exc beta
generators_bitmask(i,2,2,k) = particles_operators(i,2) ! particles for pure single exc beta
! Double excitation
generators_bitmask(i,1,3,k) = holes_operators(i,1) ! holes for first single exc alpha
generators_bitmask(i,1,4,k) = particles_operators(i,1) ! particles for first single exc alpha
generators_bitmask(i,2,3,k) = holes_operators(i,2) ! holes for first single exc beta
generators_bitmask(i,2,4,k) = particles_operators(i,2) ! particles for first single exc beta
generators_bitmask(i,1,5,k) = holes_operators(i,1) ! holes for second single exc alpha
generators_bitmask(i,1,6,k) = particles_operators(i,1) ! particles for second single exc alpha
generators_bitmask(i,2,5,k) = holes_operators(i,2) ! holes for second single exc beta
generators_bitmask(i,2,6,k) = particles_operators(i,2) ! particles for second single exc beta
enddo
enddo
touch generators_bitmask
end