subroutine GTeh_excitation_density(nBas,nC,nO,nR,nS,ERI,XpY,XmY,rhoL,rhoR)

! Compute excitation densities

  implicit none

! Input variables

  integer,intent(in)            :: nBas,nC,nO,nR,nS
  double precision,intent(in)   :: ERI(nBas,nBas,nBas,nBas)
  double precision,intent(in)   :: XpY(nS,nS)
  double precision,intent(in)   :: XmY(nS,nS)

! Local variables

  integer                       :: m,jb,p,q,j,b
  double precision,allocatable  :: X(:,:),Y(:,:)

! Output variables

  double precision,intent(out)  :: rhoL(nBas,nBas,nS)
  double precision,intent(out)  :: rhoR(nBas,nBas,nS)

! Initialization
 
  rhoL(:,:,:) = 0d0   
  rhoR(:,:,:) = 0d0   

  allocate(X(nS,nS),Y(nS,nS))

  do m=1,nS
    do jb=1,nS
      X(jb,m) = 0.5d0*(XpY(m,jb) + XmY(m,jb))
      Y(jb,m) = 0.5d0*(XpY(m,jb) - XmY(m,jb))
    end do
  end do

! call matout(nS,nS,matmul(transpose(X),X) - matmul(transpose(Y),Y))

  !$OMP PARALLEL &
  !$OMP SHARED(nC,nBas,nR,nO,nS,rhoL,rhoR,ERI,XpY,XmY) &
  !$OMP PRIVATE(q,p,jb,m,X,Y) &
  !$OMP DEFAULT(NONE)
  !$OMP DO
  do q=nC+1,nBas-nR
     do p=nC+1,nBas-nR
        jb = 0
        do j=nC+1,nO
           do b=nO+1,nBas-nR
              jb = jb + 1
              do m=1,nS

                 rhoL(p,q,m) = rhoL(p,q,m) + ERI(p,j,b,q)*X(jb,m) + ERI(p,b,j,q)*Y(jb,m)
!                rhoL(p,q,m,2) = rhoL(p,q,m,2) + ERI(p,j,b,q)*Y(jb,m) + ERI(p,b,j,q)*X(jb,m)

                 rhoR(p,q,m) = rhoR(p,q,m) & 
                               + (2d0*ERI(p,j,b,q) - ERI(p,j,q,b))*X(jb,m) + (2d0*ERI(p,b,j,q) - ERI(p,b,q,j))*Y(jb,m)
!                rhoR(p,q,m,2) = rhoR(p,q,m,2) & 
!                              + (2d0*ERI(p,j,b,q) - ERI(p,j,q,b))*Y(jb,m) + (2d0*ERI(p,b,j,q) - ERI(p,b,q,j))*X(jb,m)

              enddo
           enddo
        enddo
     enddo
  enddo
  !$OMP END DO
  !$OMP END PARALLEL

end subroutine