deltakit.circuit.noise_channels.Relax

class deltakit.circuit.noise_channels.Relax(qubit: Qubit[T] | T, probability: float, *, tag: str | None = None)

Bases: OneQubitOneProbabilityNoiseChannel[T]

The single qubit relaxation channel.

Applies a single-qubit relaxation event with the given probability. Note: this is the probability that the target, when leaked, is returned to the computational subspace.

If a qubit is relaxed, it is returned to the computational subspace and no longer marked as leaked. Once relaxed a qubit will, therefore, no longer depolarise qubits that it interacts with.

Parameters:

• qubit (Qubit[T] | T) – The qubit to apply relaxation to.

• probability (float) – A single float specifying the relaxation probability.

Methods

Relax.approx_equals	Determine whether two noise channels are equal within a given tolerance.
Relax.generator_from_prob	Return a classmethod that can be used to create a noise channel with a predetermined probability
Relax.stim_targets	Return all the stim targets which specifies this noise channel.
Relax.transform_qubits	Transform this noise channel's qubits according to the id mapping.