remap_noise_model

remap_noise_model(noise_model, remapping, discard_qubits=False, warnings=True)

Remap qubits in a noise model.

This remaps the specified gate qubits for local quantum errors, the gate and noise qubits for non-local quantum errors, and the gate qubits for local ReadoutErrors. All-qubit quantum and readout errors are unaffected.

Parameters

• noise_model (NoiseModel) – a noise model to remap qubits.

• remapping (list) – list or remappings of old qubit to new qubit. See Additional Information.

• discard_qubits (bool) – if True discard qubits not in remapping keys, if False an identity mapping wil be assumed for unnamed qubits (Default: False).

• warnings (bool) – display warnings if qubits being remapped are not in the input noise model (Default: True).

Returns

a new noise model with the same errors but remapped gate and noise qubits for local and non-local errors.

Return type

NoiseModel

Raises

NoiseError – if remapping has duplicate qubits in the remapped qubits.

Additional Information:

• The remapping map be specified as either a list of pairs: [(old, new), ...], or a list of old qubits where the new qubit is inferred from the position: [old0, old1, ...] is treated as [(old0, 0), (old1, 1), ...].

• If discard_qubits is False, any qubits in the noise model not specified in the list of old qubits will be added to the remapping as a trivial mapping (qubit, qubit).