def test_with_random_gaussian_sqrt_iswap_simulates_correctly():
engine_simulator = PhasedFSimEngineSimulator.create_with_random_gaussian_sqrt_iswap(
mean=SQRT_ISWAP_INV_PARAMETERS,
sigma=PhasedFSimCharacterization(theta=0.02,
zeta=0.05,
chi=0.05,
gamma=None,
phi=0.02),
)
a, b, c, d = cirq.LineQubit.range(4)
circuit = cirq.Circuit([
[cirq.X(a), cirq.Y(c)],
[
cirq.FSimGate(np.pi / 4, 0.0).on(a, b),
cirq.FSimGate(np.pi / 4, 0.0).on(c, d)
],
[cirq.FSimGate(np.pi / 4, 0.0).on(b, c)],
[
cirq.FSimGate(np.pi / 4, 0.0).on(b, a),
cirq.FSimGate(np.pi / 4, 0.0).on(d, c)
],
])
calibrations = engine_simulator.get_calibrations([
_create_sqrt_iswap_request([(a, b), (c, d)]),
_create_sqrt_iswap_request([(b, c)])
])
parameters = collections.ChainMap(*(calibration.parameters
for calibration in calibrations))
expected_circuit = cirq.Circuit([
[cirq.X(a), cirq.X(c)],
[
cirq.PhasedFSimGate(**parameters[(a, b)].asdict()).on(a, b),
cirq.PhasedFSimGate(**parameters[(c, d)].asdict()).on(c, d),
],
[cirq.PhasedFSimGate(**parameters[(b, c)].asdict()).on(b, c)],
[
cirq.PhasedFSimGate(**parameters[(a, b)].asdict()).on(a, b),
cirq.PhasedFSimGate(**parameters[(c, d)].asdict()).on(c, d),
],
])
actual = engine_simulator.final_state_vector(circuit)
expected = cirq.final_state_vector(expected_circuit)
assert cirq.allclose_up_to_global_phase(actual, expected)
def test_with_random_gaussian_runs_correctly() -> None:
a, b, c, d = cirq.LineQubit.range(4)
circuit = cirq.Circuit(
[
[cirq.X(a), cirq.Y(c)],
[cirq.FSimGate(np.pi / 4, 0.0).on(a, b), cirq.FSimGate(np.pi / 4, 0.0).on(c, d)],
[cirq.FSimGate(np.pi / 4, 0.0).on(b, c)],
cirq.measure(a, b, c, d, key='z'),
]
)
simulator = cirq.Simulator()
engine_simulator = PhasedFSimEngineSimulator.create_with_random_gaussian_sqrt_iswap(
SQRT_ISWAP_PARAMETERS, simulator=simulator
)
actual = engine_simulator.run(circuit, repetitions=20000).measurements['z']
expected = simulator.run(circuit, repetitions=20000).measurements['z']
assert np.allclose(np.average(actual, axis=0), np.average(expected, axis=0), atol=0.075)
def test_with_random_gaussian_sqrt_iswap_fails_with_invalid_mean() -> None:
with pytest.raises(ValueError):
PhasedFSimEngineSimulator.create_with_random_gaussian_sqrt_iswap(
mean=PhasedFSimCharacterization(theta=np.pi / 4)
)
