qilisdk.noise.dephasing

Classes

Dephasing

Pure dephasing (Tphi) noise model for single qubits.

Module Contents

class Dephasing(*, t_phi: float)

Bases: qilisdk.noise.noise.Noise, qilisdk.noise.protocols.SupportsTimeDerivedKraus, qilisdk.noise.protocols.SupportsStaticLindblad, qilisdk.noise.protocols.HasAllowedScopes

Pure dephasing (Tphi) noise model for single qubits.

This model supports both Lindblad and time-derived Kraus forms, with coherences decaying as exp(-t / Tphi).

Parameters:

t_phi (float) – Dephasing time constant (must be > 0).

Raises:

ValueError – If t_phi is not positive.

property t_phi: float

Return the dephasing time constant.

Returns:

The t_phi value.

as_lindblad() → qilisdk.noise.representations.LindbladGenerator

Return the Lindblad generator for this noise.

Returns:

The Lindblad generator representation.

as_kraus_from_duration(*, duration: float) → qilisdk.noise.representations.KrausChannel

Return a Kraus channel derived for a specific duration.

Parameters:

duration (float) – Duration over which the noise acts.

Returns:

The Kraus channel for the given duration.

classmethod allowed_scopes() → frozenset[qilisdk.noise.protocols.AttachmentScope]

Return the attachment scopes supported by this noise type.

Returns:

The set of scopes where this noise can be attached.