def test_raises_duplicate_qubits(self):
"""Test duplicate qubits raises exception"""
model = NoiseModel()
with self.assertRaises(NoiseError):
with self.assertWarns(DeprecationWarning):
remap_noise_model(model, [[0, 1], [2, 1]], warnings=False)
model = NoiseModel()
error = depolarizing_error(0.5, 1)
model.add_quantum_error(error, ['u3'], [2], False)
with self.assertRaises(NoiseError):
with self.assertWarns(DeprecationWarning):
remap_noise_model(model, [[3, 2]], warnings=False)
def test_reduce_noise_model(self):
"""Test reduction mapping of noise model."""
error1 = depolarizing_error(0.5, 1)
error2 = depolarizing_error(0.5, 2)
roerror1 = [[0.9, 0.1], [0.5, 0.5]]
roerror2 = [[0.8, 0.2, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0],
[0, 0, 0.1, 0.9]]
model = NoiseModel()
model.add_all_qubit_quantum_error(error1, ['u3'], False)
model.add_quantum_error(error1, ['u3'], [1], False)
with self.assertWarns(DeprecationWarning):
model.add_nonlocal_quantum_error(error2, ['cx'], [2, 0], [3, 1],
False)
model.add_all_qubit_readout_error(roerror1, False)
model.add_readout_error(roerror2, [0, 2], False)
remapped_model = remap_noise_model(model, [0, 1, 2],
discard_qubits=True,
warnings=False)
target = NoiseModel()
target.add_all_qubit_quantum_error(error1, ['u3'], False)
target.add_quantum_error(error1, ['u3'], [1], False)
target.add_all_qubit_readout_error(roerror1, False)
target.add_readout_error(roerror2, [0, 2], False)
self.assertEqual(remapped_model, target)
def test_remap_all_qubit_readout_errors(self):
"""Test remapping of all-qubit readout errors."""
model = NoiseModel()
error1 = [[0.9, 0.1], [0.5, 0.5]]
model.add_all_qubit_readout_error(error1, False)
remapped_model = remap_noise_model(model, [[0, 1], [1, 2], [2, 0]],
warnings=False)
self.assertEqual(remapped_model, model)
def test_remap_all_qubit_quantum_errors(self):
"""Test remapper doesn't effect all-qubit quantum errors."""
model = NoiseModel()
error1 = depolarizing_error(0.5, 1)
error2 = depolarizing_error(0.5, 2)
model.add_all_qubit_quantum_error(error1, ['u3'], False)
model.add_all_qubit_quantum_error(error2, ['cx'], False)
remapped_model = remap_noise_model(model, [[0, 1], [1, 0]],
warnings=False)
self.assertEqual(model, remapped_model)
def test_remap_quantum_errors(self):
"""Test remapping of quantum errors."""
model = NoiseModel()
error1 = depolarizing_error(0.5, 1)
error2 = depolarizing_error(0.5, 2)
model.add_quantum_error(error1, ['u3'], [0], False)
model.add_quantum_error(error2, ['cx'], [1, 2], False)
remapped_model = remap_noise_model(model, [[0, 1], [1, 2], [2, 0]],
warnings=False)
target = NoiseModel()
target.add_quantum_error(error1, ['u3'], [1], False)
target.add_quantum_error(error2, ['cx'], [2, 0], False)
self.assertEqual(remapped_model, target)
def test_remap_readout_errors(self):
"""Test remapping of readout errors."""
model = NoiseModel()
error1 = [[0.9, 0.1], [0.5, 0.5]]
error2 = [[0.8, 0.2, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0],
[0, 0, 0.1, 0.9]]
model.add_readout_error(error1, [1], False)
model.add_readout_error(error2, [0, 2], False)
remapped_model = remap_noise_model(model, [[0, 1], [1, 2], [2, 0]],
warnings=False)
target = NoiseModel()
target.add_readout_error(error1, [2], False)
target.add_readout_error(error2, [1, 0], False)
self.assertEqual(remapped_model, target)
def test_remap_nonlocal_quantum_errors(self):
"""Test remapping of non-local quantum errors."""
model = NoiseModel()
error1 = depolarizing_error(0.5, 1)
error2 = depolarizing_error(0.5, 2)
with self.assertWarns(DeprecationWarning):
model.add_nonlocal_quantum_error(error1, ['u3'], [0], [1], False)
model.add_nonlocal_quantum_error(error2, ['cx'], [1, 2], [3, 0],
False)
remapped_model = remap_noise_model(model, [[0, 1], [1, 2], [2, 0]],
warnings=False)
target = NoiseModel()
target.add_nonlocal_quantum_error(error1, ['u3'], [1], [2], False)
target.add_nonlocal_quantum_error(error2, ['cx'], [2, 0], [3, 1],
False)
self.assertEqual(remapped_model, target)