storage_error

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Creates several channels each applying the requested pauli error to a single qubit.

qualtran.surface_code.t_factory_utils.storage_error(
    kind: str, probabilities: Sequence[float], qubits: Sequence[cirq.Qid]
) -> Sequence[cirq.Operation]

Each returned operation is a channel that applies the requested error with probability probabilities[i] to the ith qubit.

The ith qubit gets transformed as

\[ \rho_i \xrightarrow (1 - p_i) \rho_i + p_i E \rho_i E^\dagger \]

where \(E\) is the requested error (one of X or Z).

Args

kind

The pauli error to apply, one of ‘Z’ or ‘X’.

probabilities

The list probabilities of the channels.

qubits

The qubits to apply the error to.

Returns

Raises

ValueError

if kind is not ‘Z’ or ‘X’.