deltakit.circuit.noise_channels.Depolarise2

class deltakit.circuit.noise_channels.Depolarise2(qubit1: Qubit[T] | T, qubit2: Qubit[T] | T, probability: float, tag: str | None = None)

Bases: OneProbabilityNoiseChannel[T], TwoQubitNoiseChannel[T]

The two-qubit depolarising channel. Applies a randomly chosen two-qubit Pauli product with a given probability.

Parameters:

• qubit1 (Qubit[T] | T) – The first qubit in the noise channel.

• qubit2 (Qubit[T] | T) – The second qubit in the noise channel.

• probability (float) – A single float specifying the depolarisation strength.

Notes

Pauli Mixture:

1-p: II

p/15: IX

p/15: IY

p/15: IZ

p/15: XI

p/15: XX

p/15: XY

p/15: XZ

p/15: YI

p/15: YX

p/15: YY

p/15: YZ

p/15: ZI

p/15: ZX

p/15: ZY

p/15: ZZ

Methods

Depolarise2.approx_equals	Determine whether two noise channels are equal within a given tolerance.
Depolarise2.from_consecutive	Yield a class instance for each pair in a flattened sequence of data.
Depolarise2.generator_from_prob	Return a classmethod that can be used to create a noise channel with a predetermined probability
Depolarise2.stim_targets	Get all stim gate targets for this noise channel in a tuple.
Depolarise2.transform_qubits	Transform this noise channel's qubits according to the id mapping.