def test_density_matrix_trial_result_qid_shape():
q0, q1 = cirq.LineQubit.range(2)
assert (
cirq.qid_shape(
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((4, 4)) / 4, qubit_map={q0: 0, q1: 1}
),
),
)
== (2, 2)
)
q0, q1 = cirq.LineQid.for_qid_shape((3, 4))
assert (
cirq.qid_shape(
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((12, 12)) / 12, qubit_map={q0: 0, q1: 1}
),
),
)
== (3, 4)
)
def test_density_matrix_simulator_state_qid_shape():
q0, q1 = cirq.LineQubit.range(2)
assert cirq.qid_shape(
cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((4, 4)) / 4, qubit_map={q0: 0, q1: 1}
)
) == (2, 2)
q0, q1 = cirq.LineQid.for_qid_shape((3, 4))
assert cirq.qid_shape(
cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((12, 12)) / 12, qubit_map={q0: 0, q1: 1}
)
) == (3, 4)
def test_density_matrix_simulator_state_eq():
q0, q1 = cirq.LineQubit.range(2)
eq = cirq.testing.EqualsTester()
eq.add_equality_group(
cirq.DensityMatrixSimulatorState(density_matrix=np.ones((2, 2)) * 0.5, qubit_map={q0: 0}),
cirq.DensityMatrixSimulatorState(density_matrix=np.ones((2, 2)) * 0.5, qubit_map={q0: 0}),
)
eq.add_equality_group(
cirq.DensityMatrixSimulatorState(density_matrix=np.eye(2) * 0.5, qubit_map={q0: 0})
)
eq.add_equality_group(
cirq.DensityMatrixSimulatorState(density_matrix=np.eye(2) * 0.5, qubit_map={q0: 0, q1: 1})
)
def test_density_matrix_trial_result_eq():
q0 = cirq.LineQubit(0)
final_simulator_state = cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((2, 2)) * 0.5,
qubit_map={q0: 0})
eq = cirq.testing.EqualsTester()
eq.add_equality_group(
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=final_simulator_state),
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=final_simulator_state))
eq.add_equality_group(
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({'s': 1}),
measurements={},
final_simulator_state=final_simulator_state))
eq.add_equality_group(
cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({'s': 1}),
measurements={'m': np.array([[1]])},
final_simulator_state=final_simulator_state))
def test_density_matrix_simulator_state_repr():
q0 = cirq.LineQubit(0)
assert (repr(cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((2, 2)) * 0.5, qubit_map={q0: 0}))
== "cirq.DensityMatrixSimulatorState(density_matrix="
"np.array([[0.5, 0.5], [0.5, 0.5]]), "
"qubit_map={cirq.LineQubit(0): 0})")
def test_simulate_moment_steps_empty_circuit(dtype):
circuit = cirq.Circuit()
simulator = cirq.DensityMatrixSimulator(dtype=dtype)
step = None
for step in simulator.simulate_moment_steps(circuit):
pass
assert step.simulator_state() == cirq.DensityMatrixSimulatorState(
density_matrix=np.array([[1]]), qubit_map={})
def test_density_matrix_trial_result_str():
q0 = cirq.LineQubit(0)
final_simulator_state = cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((2, 2)) * 0.5, qubit_map={q0: 0})
result = cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=final_simulator_state)
assert str(result) == ('measurements: (no measurements)\n'
'final density matrix:\n'
'[[0.5 0.5]\n [0.5 0.5]]')
def test_density_matrix_trial_result_str():
q0 = cirq.LineQubit(0)
final_simulator_state = cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((2, 2)) * 0.5, qubit_map={q0: 0})
result = cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({}),
measurements={},
final_simulator_state=final_simulator_state)
# numpy varies whitespace in its representation for different versions
# Eliminate whitespace to harden tests against this variation
result_no_whitespace = str(result).replace('\n', '').replace(' ', '')
assert result_no_whitespace == (
'measurements:(nomeasurements)finaldensitymatrix:[[0.50.5][0.50.5]]')
def test_density_matrix_trial_result_repr():
q0 = cirq.LineQubit(0)
final_simulator_state = cirq.DensityMatrixSimulatorState(
density_matrix=np.ones((2, 2)) * 0.5,
qubit_map={q0: 0})
assert (repr(cirq.DensityMatrixTrialResult(
params=cirq.ParamResolver({'s': 1}),
measurements={'m': np.array([[1]])},
final_simulator_state=final_simulator_state)) ==
"cirq.DensityMatrixTrialResult("
"params=cirq.ParamResolver({'s': 1}), "
"measurements={'m': array([[1]])}, "
"final_simulator_state=cirq.DensityMatrixSimulatorState("
"density_matrix=np.array([[0.5, 0.5], [0.5, 0.5]]), "
"qubit_map={cirq.LineQubit(0): 0}))""")