expectation() [2/2]

SDef syten::T3N::expectation	(	State const &	a,
		Operator const &	op,
		State const &	b
	)

Returns the expectation value of an operator between two states as \( \langle b | \left( \hat O | a \rangle \right) \).

Parameters

a	the first state, not complex conjugated, acted upon by \( \hat O \)
b	the second state, to be complex-conjugated
op	the operator

Returns

the scalar value \( \langle b | \left( \hat O | a \rangle \right) \)

References expectation_rec(), and syten::T3N::Tree::Tree< T >::Root.

Referenced by syten::T3N::TDVP::Worker::run().

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