openfermion.utils.depolarizing_channel

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Apply a depolarizing channel

openfermion.utils.depolarizing_channel(
    density_matrix, probability, target_qubit, transpose=False
)

Applies an amplitude damping channel with a given probability to the target qubit in the density_matrix.

density_matrix numpy.ndarray

Density matrix of the system

probability float

Probability error is applied p \in [0, 1] target_qubit (int/str): target for the channel error, if given special value "all", then a total depolarizing channel is applied.

transpose bool

Dummy parameter to match signature of other channels but depolarizing channel is symmetric under conjugate transpose.

new_density_matrix numpy.ndarray

Density matrix with the channel applied.