qiskit.quantum_info.DensityMatrix.expectation_value

DensityMatrix.expectation_value(oper, qargs=None)

Compute the expectation value of an operator.

Paramètres

• oper (Operator) – an operator to evaluate expval.

• qargs (None or list) – subsystems to apply the operator on.

Renvoie

the expectation value.

Type renvoyé

complex