cirq.phase_damp

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Creates a PhaseDampingChannel with damping constant gamma.

cirq.phase_damp(
    gamma: float
) -> cirq.PhaseDampingChannel

Used in the notebooks

This channel evolves a density matrix via:

$$\rho \rightarrow M_0 \rho M_0^\dagger + M_1 \rho M_1^\dagger$$

With:

$$\begin{aligned} M_0 =& \begin{bmatrix} 1 & 0 \\ 0 & \sqrt{1 - \gamma} \end{bmatrix} \\ M_1 =& \begin{bmatrix} 0 & 0 \\ 0 & \sqrt{\gamma} \end{bmatrix} \end{aligned}$$