Method detector

python/cudaq/kernel/kernel_builder.py:1261–1277

Define a detector over one or more measurement results. A detector is a parity constraint: under noise-free execution the XOR of the referenced measurements is deterministic. Each call defines one detector. Arguments are :class:`QuakeValue` handles returned by ``kern

(self, *measurements)

        return qv.mlirValue

    def detector(self, *measurements):
        """Define a detector over one or more measurement results.

        A detector is a parity constraint: under noise-free execution the
        XOR of the referenced measurements is deterministic. Each call
        defines one detector. Arguments are :class:`QuakeValue` handles
        returned by ``kernel.mz`` / ``mx`` / ``my`` (scalar handles or
        handle vectors).
        """
        if not measurements:
            emitFatalError("kernel.detector requires at least one "
                           "cudaq.measure_handle argument")
        with self.ctx, self.insertPoint, self.loc:
            values = [
                self.__qecOperandValue(m, "detector") for m in measurements
            ]
            qec.DetectorOp(values)

    def logical_observable(self, *measurements, observable_index=0):
        """Define a logical observable over one or more measurement results.