def test_json():
q0, q1 = cirq.GridQubit.rect(1, 2)
qtrit = cirq.GridQid(1, 2, dimension=3)
cirq.testing.assert_json_roundtrip_works(cirq.wait(q0, nanos=10))
cirq.testing.assert_json_roundtrip_works(cirq.wait(q0, q1, nanos=10))
cirq.testing.assert_json_roundtrip_works(cirq.wait(qtrit, nanos=10))
cirq.testing.assert_json_roundtrip_works(cirq.wait(qtrit, q1, nanos=10))
def test_cpmg_circuit():
"""Tests sub-component to make sure CPMG circuit is generated correctly."""
q = cirq.GridQubit(1, 1)
t = sympy.Symbol('t')
circuit = t2._cpmg_circuit(q, t, 2)
expected = cirq.Circuit(
cirq.Y(q)**0.5, cirq.wait(q, nanos=t), cirq.X(q),
cirq.wait(q, nanos=2 * t * sympy.Symbol('pulse_0')),
cirq.X(q)**sympy.Symbol('pulse_0'),
cirq.wait(q, nanos=2 * t * sympy.Symbol('pulse_1')),
cirq.X(q)**sympy.Symbol('pulse_1'), cirq.wait(q, nanos=t))
assert circuit == expected
def test_adding_gates_multiple_times():
# Deprecations: cirq_google.SerializableDevice, cirq_google.SerializableGateSet,
# common serializers, and
# cirq_google.devices.known_devices.create_device_proto_from_diagram
with cirq.testing.assert_deprecated(
'Use cirq_google.GridDevice',
'SerializableGateSet',
'CircuitSerializer',
'no longer be available',
deadline='v0.16',
count=11,
):
waiting_for_godot = cirq_google.SerializableGateSet(
gate_set_name='wait_gateset',
serializers=[
cgc.WAIT_GATE_SERIALIZER,
cgc.WAIT_GATE_SERIALIZER,
cgc.WAIT_GATE_SERIALIZER,
],
deserializers=[
cgc.WAIT_GATE_DESERIALIZER,
cgc.WAIT_GATE_DESERIALIZER,
cgc.WAIT_GATE_DESERIALIZER,
],
)
wait_proto = cirq_google.devices.known_devices.create_device_proto_from_diagram(
"aa", [waiting_for_godot])
wait_device = cirq_google.SerializableDevice.from_proto(
proto=wait_proto, gate_sets=[waiting_for_godot])
q0 = cirq.GridQubit(0, 0)
wait_op = cirq.wait(q0, nanos=25)
wait_device.validate_operation(wait_op)
assert (str(wait_proto) == """\
valid_gate_sets {
name: "wait_gateset"
valid_gates {
id: "wait"
number_of_qubits: 1
valid_args {
name: "nanos"
type: FLOAT
}
}
}
valid_qubits: "0_0"
valid_qubits: "0_1"
valid_targets {
name: "meas_targets"
target_ordering: SUBSET_PERMUTATION
}
valid_targets {
name: "2_qubit_targets"
target_ordering: SYMMETRIC
targets {
ids: "0_0"
ids: "0_1"
}
}
""")
def test_noise_from_wait():
# Verify that wait-gate noise is duration-dependent.
q0 = cirq.LineQubit(0)
gate_durations = {cirq.ZPowGate: 25.0}
heat_rate_GHz = {q0: 1e-5}
cool_rate_GHz = {q0: 1e-4}
model = ThermalNoiseModel(
qubits={q0},
gate_durations_ns=gate_durations,
heat_rate_GHz=heat_rate_GHz,
cool_rate_GHz=cool_rate_GHz,
dephase_rate_GHz=None,
require_physical_tag=False,
skip_measurements=True,
)
moment = cirq.Moment(cirq.wait(q0, nanos=100))
noisy_moment = model.noisy_moment(moment, system_qubits=[q0])
assert noisy_moment[0] == moment
assert len(noisy_moment[1]) == 1
noisy_choi = cirq.kraus_to_choi(cirq.kraus(noisy_moment[1].operations[0]))
print(noisy_choi)
assert np.allclose(
noisy_choi,
[
[9.99005480e-01, 0, 0, 9.94515097e-01],
[0, 9.94520111e-03, 0, 0],
[0, 0, 9.94520111e-04, 0],
[9.94515097e-01, 0, 0, 9.90054799e-01],
],
)
def test_wait_gate_multi_qubit():
# Deprecations: cirq_google.SerializableGateSet and common serializers.
with cirq.testing.assert_deprecated('SerializableGateSet',
'CircuitSerializer',
deadline='v0.16',
count=3):
gate_set = cg.SerializableGateSet('test', [cgc.WAIT_GATE_SERIALIZER],
[cgc.WAIT_GATE_DESERIALIZER])
proto = op_proto({
'gate': {
'id': 'wait'
},
'args': {
'nanos': {
'arg_value': {
'float_value': 20.0
}
}
},
'qubits': [{
'id': '1_2'
}, {
'id': '3_4'
}],
})
op = cirq.wait(cirq.GridQubit(1, 2), cirq.GridQubit(3, 4), nanos=20)
assert gate_set.serialize_op(op) == proto
assert gate_set.deserialize_op(proto) == op
def test_wait_gates():
q0 = cirq.LineQubit(0)
props = sample_noise_properties([q0], [])
model = NoiseModelFromGoogleNoiseProperties(props)
op = cirq.wait(q0, nanos=100)
circuit = cirq.Circuit(op)
noisy_circuit = circuit.with_noise(model)
assert len(noisy_circuit.moments) == 2
assert noisy_circuit.moments[0].operations[0] == op.with_tags(PHYSICAL_GATE_TAG)
# No depolarizing noise because WaitGate has none.
assert len(noisy_circuit.moments[1].operations) == 1
thermal_op = noisy_circuit.moments[1].operations[0]
assert isinstance(thermal_op.gate, cirq.KrausChannel)
thermal_choi = cirq.kraus_to_choi(cirq.kraus(thermal_op))
assert np.allclose(
thermal_choi,
[
[1, 0, 0, 9.990005e-01],
[0, 9.99500167e-04, 0, 0],
[0, 0, 0, 0],
[9.990005e-01, 0, 0, 9.990005e-01],
],
)
def test_proto_with_waitgate():
wait_gateset = cirq_google.serializable_gate_set.SerializableGateSet(
gate_set_name='wait_gateset',
serializers=[cgc.WAIT_GATE_SERIALIZER],
deserializers=[cgc.WAIT_GATE_DESERIALIZER],
)
wait_proto = cirq_google.devices.known_devices.create_device_proto_from_diagram(
"aa\naa",
[wait_gateset],
)
wait_device = cirq_google.SerializableDevice.from_proto(
proto=wait_proto, gate_sets=[wait_gateset])
q0 = cirq.GridQubit(1, 1)
wait_op = cirq.wait(q0, nanos=25)
wait_device.validate_operation(wait_op)
assert (str(wait_proto) == """\
valid_gate_sets {
name: "wait_gateset"
valid_gates {
id: "wait"
number_of_qubits: 1
valid_args {
name: "nanos"
type: FLOAT
}
}
}
valid_qubits: "0_0"
valid_qubits: "0_1"
valid_qubits: "1_0"
valid_qubits: "1_1"
valid_targets {
name: "meas_targets"
target_ordering: SUBSET_PERMUTATION
}
valid_targets {
name: "2_qubit_targets"
target_ordering: SYMMETRIC
targets {
ids: "0_0"
ids: "0_1"
}
targets {
ids: "0_0"
ids: "1_0"
}
targets {
ids: "0_1"
ids: "1_1"
}
targets {
ids: "1_0"
ids: "1_1"
}
}
""")
def test_final_state_vector_is_not_last_object():
sim = cirq.Simulator()
q = cirq.LineQubit(0)
initial_state = np.array([1, 0], dtype=np.complex64)
circuit = cirq.Circuit(cirq.wait(q))
result = sim.simulate(circuit, initial_state=initial_state)
assert result.state_vector() is not initial_state
assert not np.shares_memory(result.state_vector(), initial_state)
np.testing.assert_equal(result.state_vector(), initial_state)
def test_final_density_matrix_is_not_last_object():
sim = cirq.DensityMatrixSimulator()
q = cirq.LineQubit(0)
initial_state = np.array([[1, 0], [0, 0]], dtype=np.complex64)
circuit = cirq.Circuit(cirq.wait(q))
result = sim.simulate(circuit, initial_state=initial_state)
assert result.final_density_matrix is not initial_state
assert not np.shares_memory(result.final_density_matrix, initial_state)
np.testing.assert_equal(result.final_density_matrix, initial_state)
def test_symbolic_times_for_wait_gate():
q0 = cirq.LineQubit(0)
gate_durations = {cirq.ZPowGate: 25.0}
heat_rate_GHz = {q0: 1e-5}
cool_rate_GHz = {q0: 1e-4}
model = ThermalNoiseModel(
qubits={q0},
gate_durations_ns=gate_durations,
heat_rate_GHz=heat_rate_GHz,
cool_rate_GHz=cool_rate_GHz,
dephase_rate_GHz=None,
require_physical_tag=False,
skip_measurements=True,
)
moment = cirq.Moment(cirq.wait(q0, nanos=sympy.Symbol('t')))
with pytest.raises(ValueError, match='Symbolic'):
_ = model.noisy_moment(moment, system_qubits=[q0])
def test_proto_with_waitgate():
wait_gateset = cg.serializable_gate_set.SerializableGateSet(
gate_set_name='wait_gateset',
serializers=[cgc.WAIT_GATE_SERIALIZER],
deserializers=[cgc.WAIT_GATE_DESERIALIZER],
)
wait_proto = cg.devices.known_devices.create_device_proto_from_diagram(
"aa\naa",
[wait_gateset],
)
wait_device = cg.SerializableDevice.from_proto(proto=wait_proto,
gate_sets=[wait_gateset])
q0 = cirq.GridQubit(1, 1)
wait_op = cirq.wait(q0, nanos=25)
wait_device.validate_operation(wait_op)
assert str(wait_proto) == """\
def test_serialize_deserialize_wait_gate():
op = cirq.wait(cirq.GridQubit(1, 2), nanos=50.0)
proto = op_proto({
'gate': {
'id': 'wait'
},
'qubits': [{
'id': '1_2'
}],
'args': {
'nanos': {
'arg_value': {
'float_value': 50.0
}
},
},
})
assert cg.SYC_GATESET.serialize_op(op) == proto
assert cg.SYC_GATESET.deserialize_op(proto) == op
assert cg.SQRT_ISWAP_GATESET.serialize_op(op) == proto
assert cg.SQRT_ISWAP_GATESET.deserialize_op(proto) == op
def _all_operations(q0, q1, q2, q3, q4, include_measurements=True):
return (
cirq.Z(q0),
cirq.Z(q0)**0.625,
cirq.Y(q0),
cirq.Y(q0)**0.375,
cirq.X(q0),
cirq.X(q0)**0.875,
cirq.H(q1),
cirq.CZ(q0, q1),
cirq.CZ(q0, q1)**0.25, # Requires 2-qubit decomposition
cirq.CNOT(q0, q1),
cirq.CNOT(q0, q1)**0.5, # Requires 2-qubit decomposition
cirq.SWAP(q0, q1),
cirq.SWAP(q1, q0)**-1,
cirq.SWAP(q0, q1)**0.75, # Requires 2-qubit decomposition
cirq.CCZ(q0, q1, q2),
cirq.CCX(q0, q1, q2),
cirq.CCZ(q0, q1, q2)**0.5,
cirq.CCX(q0, q1, q2)**0.5,
cirq.CSWAP(q0, q1, q2),
cirq.XX(q0, q1),
cirq.XX(q0, q1)**0.75,
cirq.YY(q0, q1),
cirq.YY(q0, q1)**0.75,
cirq.ZZ(q0, q1),
cirq.ZZ(q0, q1)**0.75,
cirq.IdentityGate(1).on(q0),
cirq.IdentityGate(3).on(q0, q1, q2),
cirq.ISWAP(q2, q0), # Requires 2-qubit decomposition
cirq.PhasedXPowGate(phase_exponent=0.111, exponent=0.25).on(q1),
cirq.PhasedXPowGate(phase_exponent=0.333, exponent=0.5).on(q1),
cirq.PhasedXPowGate(phase_exponent=0.777, exponent=-0.5).on(q1),
cirq.wait(q0, nanos=0),
cirq.measure(q0, key='xX'),
cirq.measure(q2, key='x_a'),
cirq.measure(q3, key='X'),
cirq.measure(q2, key='x_a'),
cirq.measure(q1, q2, q3, key='multi', invert_mask=(False, True)),
)
def test_wait_gate():
gate_set = cg.SerializableGateSet('test', [cgc.WAIT_GATE_SERIALIZER],
[cgc.WAIT_GATE_DESERIALIZER])
proto = op_proto({
'gate': {
'id': 'wait'
},
'args': {
'nanos': {
'arg_value': {
'float_value': 20.0
}
}
},
'qubits': [{
'id': '1_2'
}],
})
q = cirq.GridQubit(1, 2)
op = cirq.wait(q, nanos=20)
assert gate_set.serialize_op(op) == proto
assert gate_set.deserialize_op(proto) == op
def test_adding_gates_multiple_times():
waiting_for_godot = cg.serializable_gate_set.SerializableGateSet(
gate_set_name='wait_gateset',
serializers=[
cgc.WAIT_GATE_SERIALIZER, cgc.WAIT_GATE_SERIALIZER,
cgc.WAIT_GATE_SERIALIZER
],
deserializers=[
cgc.WAIT_GATE_DESERIALIZER, cgc.WAIT_GATE_DESERIALIZER,
cgc.WAIT_GATE_DESERIALIZER
],
)
wait_proto = cg.devices.known_devices.create_device_proto_from_diagram(
"aa",
[waiting_for_godot],
)
wait_device = cg.SerializableDevice.from_proto(
proto=wait_proto, gate_sets=[waiting_for_godot])
q0 = cirq.GridQubit(0, 0)
wait_op = cirq.wait(q0, nanos=25)
wait_device.validate_operation(wait_op)
assert str(wait_proto) == """\
def test_protocols():
t = sympy.Symbol('t')
p = cirq.WaitGate(cirq.Duration(millis=5 * t))
c = cirq.WaitGate(cirq.Duration(millis=2))
q = cirq.LineQubit(0)
cirq.testing.assert_implements_consistent_protocols(cirq.wait(q, nanos=0))
cirq.testing.assert_implements_consistent_protocols(c.on(q))
cirq.testing.assert_implements_consistent_protocols(p.on(q))
assert cirq.has_unitary(p)
assert cirq.has_unitary(c)
assert cirq.is_parameterized(p)
assert not cirq.is_parameterized(c)
assert cirq.resolve_parameters(p, {'t': 2}) == cirq.WaitGate(cirq.Duration(millis=10))
assert cirq.resolve_parameters(c, {'t': 2}) == c
assert cirq.resolve_parameters_once(c, {'t': 2}) == c
assert cirq.trace_distance_bound(p) == 0
assert cirq.trace_distance_bound(c) == 0
assert cirq.inverse(c) == c
assert cirq.inverse(p) == p
assert cirq.decompose(c.on(q)) == []
assert cirq.decompose(p.on(q)) == []
def test_serialize_deserialize_wait_gate():
with cirq.testing.assert_deprecated('SerializableGateSet',
deadline='v0.16',
count=4):
op = cirq.wait(cirq.GridQubit(1, 2), nanos=50.0)
proto = op_proto({
'gate': {
'id': 'wait'
},
'qubits': [{
'id': '1_2'
}],
'args': {
'nanos': {
'arg_value': {
'float_value': 50.0
}
}
},
})
assert cg.SYC_GATESET.serialize_op(op) == proto
assert cg.SYC_GATESET.deserialize_op(proto) == op
assert cg.SQRT_ISWAP_GATESET.serialize_op(op) == proto
assert cg.SQRT_ISWAP_GATESET.deserialize_op(proto) == op
