cirq.AmplitudeDampingChannel

class cirq.AmplitudeDampingChannel(gamma)

Dampen qubit amplitudes through dissipation.

This channel models the effect of energy dissipation to the

surrounding environment.

__init__(gamma) → None

The amplitude damping channel.

Construct a channel that dissipates energy. The probability of

energy exchange occurring is given by gamma.

This channel evolves a density matrix as follows:

\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 – is gamma is not a valid probability.

Methods

on(*qubits)	Returns an application of this gate to the given qubits.
validate_args(qubits)	Checks if this gate can be applied to the given qubits.