Function applyMultiQubitPhaseShift

quest/src/api/operations.cpp:1421–1430

}

void applyMultiQubitPhaseShift(Qureg qureg, int* targets, int numTargets, qreal angle) {
    validate_quregFields(qureg, __func__);
    validate_targets(qureg, targets, numTargets, __func__);

    // treat as a (numTargets-1)-controlled 1-target diagonal matrix
    DiagMatr1 matr = getDiagMatr1({1, std::exp(1_i * angle)});

    // harmlessly re-validates
    applyMultiStateControlledDiagMatr1(qureg, &targets[1], nullptr, numTargets-1, targets[0], matr);
}

} // end de-mangler