cirq.experiments.compute_grid_parallel_two_qubit_xeb_results

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Compute grid parallel two-qubit XEB results from experimental data.

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Main aliases

cirq.experiments.grid_parallel_two_qubit_xeb.compute_grid_parallel_two_qubit_xeb_results

cirq.experiments.compute_grid_parallel_two_qubit_xeb_results(
    data_collection_id: str,
    num_processors: int = 1,
    base_dir: str = DEFAULT_BASE_DIR
) -> cirq.experiments.CrossEntropyResultDict

XEB fidelities are calculated using the least squares XEB fidelity estimator with the linear cross entropy observable. Using notation from the docstring of cirq.experiments.least_squares_xeb_fidelity_from_expectations, the linear cross entropy observable O_U has eigenvalue corresponding to the computational basis state |z⟩ given by D * |⟨z|𝜓_U⟩|^2.

Purity values are calculated using speckle purity benchmarking. For details, see the docstring of the method cirq.experiments.purity_from_probabilities.

Results are saved in the file {base_dir}/{data_collection_id}/results.json.

Args
data_collection_id	The data collection ID of the data set to analyze.
num_processors	The number of CPUs to use.
base_dir	The base directory from which to read data.

Returns
CrossEntropyResultDict mapping qubit pairs to XEB results.

Side effects:

Saves the returned CrossEntropyResultDict to the file {base_dir}/{data_collection_id}/results.json.