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RepetitionCode

RepetitionCode(d, T=0) GitHub(opens in a new tab)

Implementation of a distance d repetition code, implemented over T syndrome measurement rounds.

Creates the circuits corresponding to a logical 0 and 1 encoded using a repetition code.

Parameters

  • d (int) – Number of code qubits (and hence repetitions) used.
  • T (int) – Number of rounds of ancilla-assisted syndrome measurement.

Additional information:

No measurements are added to the circuit if T=0. Otherwise T rounds are added, followed by measurement of the code qubits (corresponding to a logical measurement and final syndrome measurement round).


Methods

get_circuit_list

RepetitionCode.get_circuit_list()

Returns

self.circuit as a list, with circuit_list[0] = circuit[‘0’] circuit_list[1] = circuit[‘1’]

Return type

circuit_list

process_results

RepetitionCode.process_results(raw_results)

Parameters

raw_results (dict) – A dictionary whose keys are logical values, and whose values are standard counts dictionaries, (as obtained from the get_counts method of a qiskit.Result object).

Returns

Dictionary with the same structure as the input, but with

the bit strings used as keys in the counts dictionaries converted to the form required by the decoder.

Return type

results

Additional information:

The circuits must be executed outside of this class, so that their is full freedom to compile, choose a backend, use a noise model, etc. The results from these executions should then be used to create the input for this method.

readout

RepetitionCode.readout()

Readout of all code qubits, which corresponds to a logical measurement as well as allowing for a measurement of the syndrome to be inferred.

syndrome_measurement

RepetitionCode.syndrome_measurement(reset=True, barrier=False)

Application of a syndrome measurement round.

Parameters

  • reset (bool) – If set to true add a boolean at the end of each round
  • barrier (bool) – Boolean denoting whether to include a barrier at the end.

x

RepetitionCode.x(logs=('0', '1'), barrier=False)

Applies a logical x to the circuits for the given logical values.

Parameters

  • logs (list or tuple) – List or tuple of logical values expressed as strings.
  • barrier (bool) – Boolean denoting whether to include a barrier at the end.
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