RepetitionCode
class RepetitionCode(d, T=0, xbasis=False, resets=False, delay=0)
Bases: object
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.
- xbasis (bool) – Whether to use the X basis to use for encoding (Z basis used by default).
- resets (bool) – Whether to include a reset gate after mid-circuit measurements.
- delay (float) – Time (in dt) to delay after mid-circuit measurements (and delay).
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(final=False, barrier=False, delay=0)
Application of a syndrome measurement round.
Parameters
- final (bool) – Whether this is the final syndrome measurement round.
- barrier (bool) – Boolean denoting whether to include a barrier at the end.
- delay (float) – Time (in dt) to delay after mid-circuit measurements (and delay).
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.