supermarq.benchmarks.phase_code

Classes

PhaseCode

Creates a circuit for syndrome measurement in a phase-flip error correcting code.

Module Contents

class supermarq.benchmarks.phase_code.PhaseCode(num_data_qubits: int, num_rounds: int, phase_state: list[int])

Bases: supermarq.benchmark.Benchmark

Creates a circuit for syndrome measurement in a phase-flip error correcting code.

Parameters:

• num_data – The number of data qubits.

• num_rounds – The number of measurement rounds.

• phase_state – A list of zeros and ones denoting the state to initialize each data qubit to. Currently just + or - states. 0 -> +, 1 -> -.

Returns:

A cirq.Circuit for the phase-flip error correcting code.

circuit() → cirq.Circuit

Generates phase code circuit.

Returns:

A cirq.Circuit.

score(counts: dict[str, float]) → float

Compute benchmark score.

Device performance is given by the Hellinger fidelity between the experimental results and the ideal distribution. The ideal is known based on the phase_state parameter.

Parameters:

counts – Dictionary containing the measurement counts from running self.circuit().

Returns:

A float with the computed score.

num_data_qubits

num_rounds

phase_state