loom.interpreter.logical_observable

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class loom.interpreter.logical_observable.LogicalObservable(*args, **kwargs)

Bases: object

Once a logical operator is measured, the details of the measurement are stored in an instance of LogicalObservable. This dataclass does not store the actual value of the logical observable but instead the required information on how to calculate it given the output of a quantum circuit.

Parameters:

• label (str) – Label of the logical observable measurement which is later on used to access the measurement result

• measurements (tuple[Cbit, ...]) – Tuple of classical bits from which the logical observable is calculated. The logical observable is calculated by taking the parity of these measurements. This includes the readout of data qubits as well as potential updates/ corrections based on data qubit readouts during e.g. split or shrink operations.

label: str

measurements: tuple[Union[tuple[str, int], Literal[1, 0]], ...]