cirq.amplitude_damp¶

cirq.amplitude_damp(gamma: float) → cirq.ops.common_channels.AmplitudeDampingChannel[source]¶

Returns an AmplitudeDampingChannel with the given probability gamma.

This channel evolves a density matrix via:

\rho -> M_0 \rho M_0^\dagger + M_1 \rho M_1^\dagger

With:

M_0 = \begin{bmatrix}
        1 & 0  \\
        0 & \sqrt{1 - \gamma}
      \end{bmatrix}

M_1 = \begin{bmatrix}
        0 & \sqrt{\gamma} \\
        0 & 0
      \end{bmatrix}

Parameters:	gamma – the probability of the interaction being dissipative.
Raises:	`ValueError` – if gamma is not a valid probability.