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ion_device_test.py
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ion_device_test.py
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# Copyright 2018 The Cirq Developers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from datetime import timedelta
import numpy as np
import pytest
import cirq
import cirq.ion as ci
def ion_device(chain_length: int, use_timedelta=False) -> ci.IonDevice:
ms = 1000 * cirq.Duration(nanos=1) if not use_timedelta else timedelta(microseconds=1)
return ci.IonDevice( # type: ignore
measurement_duration=100 * ms, # type: ignore
twoq_gates_duration=200 * ms, # type: ignore
oneq_gates_duration=10 * ms, # type: ignore
qubits=cirq.LineQubit.range(chain_length),
)
class NotImplementedOperation(cirq.Operation):
def with_qubits(self, *new_qubits) -> 'NotImplementedOperation':
raise NotImplementedError()
@property
def qubits(self):
raise NotImplementedError()
def test_init():
d = ion_device(3)
ms = 1000 * cirq.Duration(nanos=1)
q0 = cirq.LineQubit(0)
q1 = cirq.LineQubit(1)
q2 = cirq.LineQubit(2)
assert d.qubits == {q0, q1, q2}
assert d.duration_of(cirq.Z(q0)) == 10 * ms
assert d.duration_of(cirq.measure(q0)) == 100 * ms
assert d.duration_of(cirq.measure(q0, q1)) == 100 * ms
assert d.duration_of(cirq.ops.XX(q0, q1)) == 200 * ms
with pytest.raises(ValueError):
_ = d.duration_of(cirq.SingleQubitGate().on(q0))
def test_init_timedelta():
d = ion_device(3, use_timedelta=True)
ms = 1000 * cirq.Duration(nanos=1)
q0 = cirq.LineQubit(0)
q1 = cirq.LineQubit(1)
q2 = cirq.LineQubit(2)
assert d.qubits == {q0, q1, q2}
assert d.duration_of(cirq.Z(q0)) == 10 * ms
assert d.duration_of(cirq.measure(q0)) == 100 * ms
assert d.duration_of(cirq.measure(q0, q1)) == 100 * ms
assert d.duration_of(cirq.ops.XX(q0, q1)) == 200 * ms
with pytest.raises(ValueError):
_ = d.duration_of(cirq.SingleQubitGate().on(q0))
def test_decomposition():
d = ion_device(3)
q0 = cirq.LineQubit(0)
q1 = cirq.LineQubit(1)
assert d.decompose_operation(cirq.H(q0)) == [
cirq.rx(np.pi * 1.0).on(cirq.LineQubit(0)),
cirq.ry(np.pi * -0.5).on(cirq.LineQubit(0)),
]
circuit = cirq.Circuit()
circuit.append([cirq.X(q0), cirq.CNOT(q0, q1)])
ion_circuit = d.decompose_circuit(circuit)
d.validate_circuit(ion_circuit)
cirq.testing.assert_circuits_with_terminal_measurements_are_equivalent(
circuit, ion_circuit, atol=1e-6
)
def test_repr():
d = ion_device(3)
assert repr(d) == (
"IonDevice("
"measurement_duration=cirq.Duration(micros=100), "
"twoq_gates_duration=cirq.Duration(micros=200), "
"oneq_gates_duration=cirq.Duration(micros=10) "
"qubits=[cirq.LineQubit(0), cirq.LineQubit(1), "
"cirq.LineQubit(2)])"
)
def test_validate_measurement_non_adjacent_qubits_ok():
d = ion_device(3)
d.validate_operation(
cirq.GateOperation(cirq.MeasurementGate(2, 'key'), (cirq.LineQubit(0), cirq.LineQubit(1)))
)
def test_validate_operation_existing_qubits():
d = ion_device(3)
d.validate_operation(cirq.GateOperation(cirq.XX, (cirq.LineQubit(0), cirq.LineQubit(1))))
d.validate_operation(cirq.Z(cirq.LineQubit(0)))
d.validate_operation(
cirq.PhasedXPowGate(phase_exponent=0.75, exponent=0.25, global_shift=0.1).on(
cirq.LineQubit(1)
)
)
with pytest.raises(ValueError):
d.validate_operation(cirq.CZ(cirq.LineQubit(0), cirq.LineQubit(-1)))
with pytest.raises(ValueError):
d.validate_operation(cirq.Z(cirq.LineQubit(-1)))
with pytest.raises(ValueError):
d.validate_operation(cirq.CZ(cirq.LineQubit(1), cirq.LineQubit(1)))
with pytest.raises(ValueError):
d.validate_operation(cirq.X(cirq.NamedQubit("q1")))
def test_validate_operation_supported_gate():
d = ion_device(3)
class MyGate(cirq.Gate):
def num_qubits(self):
return 1
d.validate_operation(cirq.GateOperation(cirq.Z, [cirq.LineQubit(0)]))
assert MyGate().num_qubits() == 1
with pytest.raises(ValueError):
d.validate_operation(cirq.GateOperation(MyGate(), [cirq.LineQubit(0)]))
with pytest.raises(ValueError):
d.validate_operation(NotImplementedOperation())
def test_can_add_operation_into_moment():
d = ion_device(3)
q0 = cirq.LineQubit(0)
q1 = cirq.LineQubit(1)
q2 = cirq.LineQubit(2)
q3 = cirq.LineQubit(3)
circuit = cirq.Circuit()
circuit.append(cirq.XX(q0, q1))
for moment in circuit:
assert not d.can_add_operation_into_moment(cirq.XX(q2, q0), moment)
assert not d.can_add_operation_into_moment(cirq.XX(q1, q2), moment)
assert d.can_add_operation_into_moment(cirq.XX(q2, q3), moment)
assert d.can_add_operation_into_moment(cirq.Z(q3), moment)
circuit = cirq.Circuit([cirq.X(q0)])
assert d.can_add_operation_into_moment(cirq.XX(q1, q2), circuit[0])
def test_ion_device_eq():
eq = cirq.testing.EqualsTester()
eq.make_equality_group(lambda: ion_device(3))
eq.make_equality_group(lambda: ion_device(4))
def test_validate_circuit_repeat_measurement_keys():
d = ion_device(3)
circuit = cirq.Circuit()
circuit.append(
[cirq.measure(cirq.LineQubit(0), key='a'), cirq.measure(cirq.LineQubit(1), key='a')]
)
with pytest.raises(ValueError, match='Measurement key a repeated'):
d.validate_circuit(circuit)
def test_ion_device_str():
assert (
str(ion_device(3)).strip()
== """
0───1───2
""".strip()
)
def test_at():
d = ion_device(3)
assert d.at(-1) is None
assert d.at(0) == cirq.LineQubit(0)
assert d.at(2) == cirq.LineQubit(2)
def test_qubit_set():
assert ion_device(3).qubit_set() == frozenset(cirq.LineQubit.range(3))
def test_qid_pairs():
assert len(ion_device(10).qid_pairs()) == 45