9
1
mirror of https://github.com/QuantumPackage/qp2.git synced 2024-11-14 09:23:39 +01:00
qp2/src/mo_one_e_ints/ao_to_mo.irp.f

67 lines
2.1 KiB
Fortran
Raw Normal View History

2019-01-25 11:39:31 +01:00
subroutine mo_to_ao(A_mo,LDA_mo,A_ao,LDA_ao)
implicit none
BEGIN_DOC
! Transform A from the MO basis to the AO basis
!
! $(S.C).A_{mo}.(S.C)^\dagger$
END_DOC
integer, intent(in) :: LDA_ao,LDA_mo
double precision, intent(in) :: A_mo(LDA_mo,mo_num)
double precision, intent(out) :: A_ao(LDA_ao,ao_num)
double precision, allocatable :: T(:,:)
allocate ( T(mo_num,ao_num) )
call dgemm('N','T', mo_num, ao_num, mo_num, &
1.d0, A_mo,size(A_mo,1), &
S_mo_coef, size(S_mo_coef,1), &
0.d0, T, size(T,1))
call dgemm('N','N', ao_num, ao_num, mo_num, &
1.d0, S_mo_coef, size(S_mo_coef,1), &
T, size(T,1), &
0.d0, A_ao, size(A_ao,1))
deallocate(T)
end
subroutine mo_to_ao_no_overlap(A_mo,LDA_mo,A_ao,LDA_ao)
implicit none
BEGIN_DOC
! $C.A_{mo}.C^\dagger$
END_DOC
integer, intent(in) :: LDA_ao,LDA_mo
double precision, intent(in) :: A_mo(LDA_mo,mo_num)
double precision, intent(out) :: A_ao(LDA_ao,ao_num)
double precision, allocatable :: T(:,:)
allocate ( T(mo_num,ao_num) )
call dgemm('N','T', mo_num, ao_num, mo_num, &
1.d0, A_mo,size(A_mo,1), &
mo_coef, size(mo_coef,1), &
0.d0, T, size(T,1))
call dgemm('N','N', ao_num, ao_num, mo_num, &
1.d0, mo_coef, size(mo_coef,1), &
T, size(T,1), &
0.d0, A_ao, size(A_ao,1))
deallocate(T)
end
BEGIN_PROVIDER [ double precision, S_mo_coef, (ao_num, mo_num) ]
implicit none
BEGIN_DOC
! Product S.C where S is the overlap matrix in the AO basis and C the mo_coef matrix.
END_DOC
call dgemm('N','N', ao_num, mo_num, ao_num, &
1.d0, ao_overlap,size(ao_overlap,1), &
mo_coef, size(mo_coef,1), &
0.d0, S_mo_coef, size(S_mo_coef,1))
END_PROVIDER