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https://github.com/LCPQ/quantum_package
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67 lines
2.2 KiB
Fortran
67 lines
2.2 KiB
Fortran
subroutine run_mrcc
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implicit none
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call set_generators_bitmasks_as_holes_and_particles
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call mrcc_iterations
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end
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subroutine mrcc_iterations
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implicit none
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integer :: i,j
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double precision :: E_new, E_old, delta_e
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integer :: iteration
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E_new = 0.d0
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delta_E = 1.d0
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iteration = 0
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do while (delta_E > 1.d-10)
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iteration += 1
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print *, '==========================='
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print *, 'MRCC Iteration', iteration
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print *, '==========================='
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print *, ''
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E_old = sum(ci_energy_dressed)
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call write_double(6,ci_energy_dressed(1),"MRCC energy")
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call diagonalize_ci_dressed
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E_new = sum(ci_energy_dressed)
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delta_E = dabs(E_new - E_old)
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if (iteration > 20) then
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exit
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endif
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enddo
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call write_double(6,ci_energy_dressed(1),"Final MRCC energy")
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call ezfio_set_mrcc_cassd_energy(ci_energy_dressed(1))
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call save_wavefunction
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end
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subroutine set_generators_bitmasks_as_holes_and_particles
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implicit none
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integer :: i,k
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do k = 1, N_generators_bitmask
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do i = 1, N_int
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! Pure single part
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generators_bitmask(i,1,1,k) = holes_operators(i,1) ! holes for pure single exc alpha
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generators_bitmask(i,1,2,k) = particles_operators(i,1) ! particles for pure single exc alpha
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generators_bitmask(i,2,1,k) = holes_operators(i,2) ! holes for pure single exc beta
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generators_bitmask(i,2,2,k) = particles_operators(i,2) ! particles for pure single exc beta
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! Double excitation
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generators_bitmask(i,1,3,k) = holes_operators(i,1) ! holes for first single exc alpha
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generators_bitmask(i,1,4,k) = particles_operators(i,1) ! particles for first single exc alpha
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generators_bitmask(i,2,3,k) = holes_operators(i,2) ! holes for first single exc beta
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generators_bitmask(i,2,4,k) = particles_operators(i,2) ! particles for first single exc beta
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generators_bitmask(i,1,5,k) = holes_operators(i,1) ! holes for second single exc alpha
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generators_bitmask(i,1,6,k) = particles_operators(i,1) ! particles for second single exc alpha
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generators_bitmask(i,2,5,k) = holes_operators(i,2) ! holes for second single exc beta
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generators_bitmask(i,2,6,k) = particles_operators(i,2) ! particles for second single exc beta
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enddo
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enddo
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touch generators_bitmask
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end
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