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mirror of https://github.com/QuantumPackage/qp2.git synced 2024-10-15 20:21:34 +02:00
qp2/src/utils_trust_region/apply_mo_rotation.irp.f

86 lines
2.0 KiB
Fortran

! Apply MO rotation
! Subroutine to apply the rotation matrix to the coefficients of the
! MOs.
! New MOs = Old MOs . Rotation matrix
! *Compute the new MOs with the previous MOs and a rotation matrix*
! Provided:
! | mo_num | integer | number of MOs |
! | ao_num | integer | number of AOs |
! | mo_coef(ao_num,mo_num) | double precision | coefficients of the MOs |
! Intent in:
! | R(mo_num,mo_num) | double precision | rotation matrix |
! Intent out:
! | prev_mos(ao_num,mo_num) | double precision | MOs before the rotation |
! Internal:
! | new_mos(ao_num,mo_num) | double precision | MOs after the rotation |
! | i,j | integer | indexes |
subroutine apply_mo_rotation(R,prev_mos)
include 'pi.h'
!BEGIN_DOC
! Compute the new MOs knowing the rotation matrix
!END_DOC
implicit none
! Variables
! in
double precision, intent(in) :: R(mo_num,mo_num)
! out
double precision, intent(out) :: prev_mos(ao_num,mo_num)
! internal
double precision, allocatable :: new_mos(:,:)
integer :: i,j
double precision :: t1,t2,t3
print*,''
print*,'---apply_mo_rotation---'
call wall_time(t1)
! Allocation
allocate(new_mos(ao_num,mo_num))
! Calculation
! Product of old MOs (mo_coef) by Rotation matrix (R)
call dgemm('N','N',ao_num,mo_num,mo_num,1d0,mo_coef,size(mo_coef,1),R,size(R,1),0d0,new_mos,size(new_mos,1))
prev_mos = mo_coef
mo_coef = new_mos
if (debug) then
print*,'New mo_coef : '
do i = 1, mo_num
write(*,'(100(F10.5))') mo_coef(i,:)
enddo
endif
! Save the new MOs and change the label
mo_label = 'MCSCF'
!call save_mos
call ezfio_set_determinants_mo_label(mo_label)
!print*,'Done, MOs saved'
! Deallocation, end
deallocate(new_mos)
call wall_time(t2)
t3 = t2 - t1
print*,'Time in apply mo rotation:', t3
print*,'---End apply_mo_rotation---'
end subroutine