approximate_quantum_error

approximate_quantum_error(error, *, operator_string=None, operator_dict=None, operator_list=None)

Return an approximate QuantumError bases on the Hilbert-Schmidt metric.

Currently this is only implemented for 1-qubit QuantumErrors.

Parameters

• error (QuantumError) – the error to be approximated.
• operator_string (string or None) – a name for a pre-made set of building blocks for the output channel (Default: None).
• operator_dict (dict or None) – a dictionary whose values are the building blocks for the output channel (Default: None).
• operator_list (dict or None) – list of building blocks for the output channel (Default: None).

Returns

the approximate quantum error.

Return type

QuantumError

Raises

• NoiseError – if number of qubits is not supported or approximation failed.
• RuntimeError – If there’s no information about the noise type.

Additional Information:

The operator input precedence is: list < dict < str. If a string is given, dict is overwritten; if a dict is given, list is overwritten. Oossible values for string are 'pauli', 'reset', 'clifford'. For further information see NoiseTransformer.named_operators().