Function calcExpecPauliStrSum

quest/src/api/calculations.cpp:146–158

qreal calcExpecPauliStrSum(Qureg qureg, PauliStrSum sum) {
    validate_quregFields(qureg, __func__);
    validate_pauliStrSumFields(sum, __func__);
    validate_pauliStrSumTargets(sum, qureg, __func__);
    validate_pauliStrSumIsHermitian(sum, __func__);

    qcomp value = (qureg.isDensityMatrix)?
        localiser_densmatr_calcExpecPauliStrSum(qureg, sum):
        localiser_statevec_calcExpecPauliStrSum(qureg, sum);

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


qreal calcExpecFullStateDiagMatr(Qureg qureg, FullStateDiagMatr matrix) {