braket.experimental.algorithms.chsh_inequality.chsh_inequality module

braket.experimental.algorithms.chsh_inequality.chsh_inequality.create_chsh_inequality_circuits(qubit0: Qubit = 0, qubit1: Qubit = 1, *, a1: float = 1.5707963267948966, a2: float = 0, b1: float = 0.7853981633974483, b2: float = 2.356194490192345) → List[Circuit]

Create the four circuits for CHSH inequality. Default angles will give maximum violation of the inequality.

Parameters:

• qubit0 (Qubit) – First qubit.

• qubit1 (Qubit) – Second qubit.

• a1 (float) – First basis rotation angle for first qubit.

• a2 (float) – Second basis rotation angle for first qubit.

• b1 (float) – First basis rotation angle for second qubit.

• b2 (float) – Second basis rotation angle for second qubit.

Returns:

List[Circuit] – List of quantum circuits.

braket.experimental.algorithms.chsh_inequality.chsh_inequality.run_chsh_inequality(circuits: List[Circuit], device: Device, shots: int = 1000) → List[QuantumTask]

Submit four CHSH circuits to a device.

Parameters:

• circuits (List[Circuit]) – Four CHSH inequality circuits to run.

• device (Device) – Quantum device or simulator.

• shots (int) – Number of shots. Defaults to 1_000.

Returns:

List[QuantumTask] – List of quantum tasks.

braket.experimental.algorithms.chsh_inequality.chsh_inequality.get_chsh_results(tasks: List[QuantumTask], verbose: bool = True) → Tuple[float, List[Counter], float, float, float]

Return CHSH task results after post-processing.

Parameters:

• tasks (List[QuantumTask]) – List of quantum tasks.

• verbose (bool) – Controls printing of the inequality result. Defaults to True.

Returns:

Tuple[float, List[Counter], float, float, float] – The chsh_value, list of results, and the four probabilities: E_a1b1, E_a1b2, E_a2b1, E_a2b2.