Function calcExpecPauliStr

quest/src/api/calculations.cpp:133–143

qreal calcExpecPauliStr(Qureg qureg, PauliStr str) {
    validate_quregFields(qureg, __func__);
    validate_pauliStrTargets(qureg, str, __func__);

    qcomp value = (qureg.isDensityMatrix)?
        localiser_densmatr_calcExpecPauliStr(qureg, str):
        localiser_statevec_calcExpecPauliStr(qureg, str);

    validate_expecPauliStrValueIsReal(value, qureg.isDensityMatrix, __func__);
    return std::real(value);
}


qreal calcExpecPauliStrSum(Qureg qureg, PauliStrSum sum) {