dyn_ladder_op_exc Function

public pure function dyn_ladder_op_exc(nI, exc) result(res)

Evaluates $< D_i | S_-S_+ | D_j >$

$D_j$ is connected to $D_i$ via the excitation exc.

Note that the sign in front of the off-diagonal elements is always +1 if we assume the NECI order of spin orbitals.

Arguments

Type	Intent	Optional	Attributes		Name
integer,	intent(in)			::	nI(:)	The bra Slater determinant in nI format.
class(Excitation_t),	intent(in)			::	exc	An excitation.

Return Value real(kind=dp)

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