def test_gate_equality():
eq = cirq.testing.EqualsTester()
eq.add_equality_group(cirq.CSwapGate(), cirq.CSwapGate())
eq.add_equality_group(cirq.CZPowGate(), cirq.CZPowGate())
eq.add_equality_group(cirq.CCXPowGate(), cirq.CCXPowGate(),
cirq.CCNotPowGate())
eq.add_equality_group(cirq.CCZPowGate(), cirq.CCZPowGate())
def controlled(self,
num_controls: int = None,
control_values: Optional[Sequence[
Union[int, Collection[int]]]] = None,
control_qid_shape: Optional[Tuple[int, ...]] = None
) -> raw_types.Gate:
"""
Constructs CCZPowGate from controlled CZPowGate when applicable.
This method is a specialized controlled method for CZPowGate. It
overrides the default behavior of returning a ControlledGate by
transforming the underlying controlled gate to a CCZPowGate and
removing the last specified control qubit (which acts first
semantically). If this is a gate with multiple control qubits, it will
now be a ControlledGate with one less control.
This behavior only occurs when the last control qubit is a default-type
control qubit. A default-type control qubit is one with shape of 2 (not
a generic qudit) and where the control is satisfied by the qubit being
ON, as opposed to OFF.
(Note that a CCZPowGate is, by definition, a controlled-CZPowGate.)
"""
result = super().controlled(num_controls, control_values,
control_qid_shape)
if (isinstance(result, controlled_gate.ControlledGate) and
result.control_values[-1] == (1,) and
result.control_qid_shape[-1] == 2):
return cirq.CCZPowGate(exponent=self._exponent,
global_shift=self._global_shift).controlled(
result.num_controls() - 1,
result.control_values[:-1],
result.control_qid_shape[:-1])
return result
def get_default_noise_dict(self) -> Dict[str, Any]:
"""Returns the current noise parameters"""
default_noise_dict = {
str(cirq.YPowGate()): cirq.depolarize(1e-2),
str(cirq.ZPowGate()): cirq.depolarize(1e-2),
str(cirq.XPowGate()): cirq.depolarize(1e-2),
str(cirq.PhasedXPowGate(phase_exponent=0)): cirq.depolarize(1e-2),
str(cirq.HPowGate(exponent=1)): cirq.depolarize(1e-2),
str(cirq.CNotPowGate(exponent=1)): cirq.depolarize(3e-2),
str(cirq.CZPowGate(exponent=1)): cirq.depolarize(3e-2),
str(cirq.CCXPowGate(exponent=1)): cirq.depolarize(8e-2),
str(cirq.CCZPowGate(exponent=1)): cirq.depolarize(8e-2),
}
return default_noise_dict
def controlled(
self,
num_controls: int = None,
control_values: Optional[Sequence[Union[int,
Collection[int]]]] = None,
control_qid_shape: Optional[Tuple[int,
...]] = None) -> raw_types.Gate:
"""
Returns a controlled `CZPowGate`, using a `CCZPowGate` where possible.
The `controlled` method of the `Gate` class, of which this class is a
child, returns a `ControlledGate`. This method overrides this behavior
to return a `CCZPowGate` or a `ControlledGate` of a `CCZPowGate`, when
this is possible.
The conditions for the override to occur are:
* The `global_shift` of the `CZPowGate` is 0.
* The `control_values` and `control_qid_shape` are compatible with
the `CCZPowGate`:
* The last value of `control_qid_shape` is a qubit.
* The last value of `control_values` corresponds to the
control being satisfied if that last qubit is 1 and
not satisfied if the last qubit is 0.
If these conditions are met, then the returned object is a `CCZPowGate`
or, in the case that there is more than one controlled qudit, a
`ControlledGate` with the `Gate` being a `CCZPowGate`. In the
latter case the `ControlledGate` is controlled by one less qudit
than specified in `control_values` and `control_qid_shape` (since
one of these, the last qubit, is used as the control for the
`CCZPowGate`).
If the above conditions are not met, a `ControlledGate` of this
gate will be returned.
"""
result = super().controlled(num_controls, control_values,
control_qid_shape)
if (self._global_shift == 0
and isinstance(result, controlled_gate.ControlledGate)
and result.control_values[-1] == (1, )
and result.control_qid_shape[-1] == 2):
return cirq.CCZPowGate(exponent=self._exponent,
global_shift=self._global_shift).controlled(
result.num_controls() - 1,
result.control_values[:-1],
result.control_qid_shape[:-1])
return result
def test_cirq_qsim_all_supported_gates():
q0 = cirq.GridQubit(1, 1)
q1 = cirq.GridQubit(1, 0)
q2 = cirq.GridQubit(0, 1)
q3 = cirq.GridQubit(0, 0)
circuit = cirq.Circuit(
cirq.Moment(
cirq.H(q0),
cirq.H(q1),
cirq.H(q2),
cirq.H(q3),
),
cirq.Moment(
cirq.T(q0),
cirq.T(q1),
cirq.T(q2),
cirq.T(q3),
),
cirq.Moment(
cirq.CZPowGate(exponent=0.7, global_shift=0.2)(q0, q1),
cirq.CXPowGate(exponent=1.2, global_shift=0.4)(q2, q3),
),
cirq.Moment(
cirq.XPowGate(exponent=0.3, global_shift=1.1)(q0),
cirq.YPowGate(exponent=0.4, global_shift=1)(q1),
cirq.ZPowGate(exponent=0.5, global_shift=0.9)(q2),
cirq.HPowGate(exponent=0.6, global_shift=0.8)(q3),
),
cirq.Moment(
cirq.CX(q0, q2),
cirq.CZ(q1, q3),
),
cirq.Moment(
cirq.X(q0),
cirq.Y(q1),
cirq.Z(q2),
cirq.S(q3),
),
cirq.Moment(
cirq.XXPowGate(exponent=0.4, global_shift=0.7)(q0, q1),
cirq.YYPowGate(exponent=0.8, global_shift=0.5)(q2, q3),
),
cirq.Moment(cirq.I(q0), cirq.I(q1), cirq.IdentityGate(2)(q2, q3)),
cirq.Moment(
cirq.rx(0.7)(q0),
cirq.ry(0.2)(q1),
cirq.rz(0.4)(q2),
cirq.PhasedXPowGate(phase_exponent=0.8, exponent=0.6, global_shift=0.3)(q3),
),
cirq.Moment(
cirq.ZZPowGate(exponent=0.3, global_shift=1.3)(q0, q2),
cirq.ISwapPowGate(exponent=0.6, global_shift=1.2)(q1, q3),
),
cirq.Moment(
cirq.XPowGate(exponent=0.1, global_shift=0.9)(q0),
cirq.YPowGate(exponent=0.2, global_shift=1)(q1),
cirq.ZPowGate(exponent=0.3, global_shift=1.1)(q2),
cirq.HPowGate(exponent=0.4, global_shift=1.2)(q3),
),
cirq.Moment(
cirq.SwapPowGate(exponent=0.2, global_shift=0.9)(q0, q1),
cirq.PhasedISwapPowGate(phase_exponent=0.8, exponent=0.6)(q2, q3),
),
cirq.Moment(
cirq.PhasedXZGate(x_exponent=0.2, z_exponent=0.3, axis_phase_exponent=1.4)(
q0
),
cirq.T(q1),
cirq.H(q2),
cirq.S(q3),
),
cirq.Moment(
cirq.SWAP(q0, q2),
cirq.XX(q1, q3),
),
cirq.Moment(
cirq.rx(0.8)(q0),
cirq.ry(0.9)(q1),
cirq.rz(1.2)(q2),
cirq.T(q3),
),
cirq.Moment(
cirq.YY(q0, q1),
cirq.ISWAP(q2, q3),
),
cirq.Moment(
cirq.T(q0),
cirq.Z(q1),
cirq.Y(q2),
cirq.X(q3),
),
cirq.Moment(
cirq.FSimGate(0.3, 1.7)(q0, q2),
cirq.ZZ(q1, q3),
),
cirq.Moment(
cirq.ry(1.3)(q0),
cirq.rz(0.4)(q1),
cirq.rx(0.7)(q2),
cirq.S(q3),
),
cirq.Moment(
cirq.IdentityGate(4).on(q0, q1, q2, q3),
),
cirq.Moment(
cirq.CCZPowGate(exponent=0.7, global_shift=0.3)(q2, q0, q1),
),
cirq.Moment(
cirq.CCXPowGate(exponent=0.4, global_shift=0.6)(q3, q1, q0).controlled_by(
q2, control_values=[0]
),
),
cirq.Moment(
cirq.rx(0.3)(q0),
cirq.ry(0.5)(q1),
cirq.rz(0.7)(q2),
cirq.rx(0.9)(q3),
),
cirq.Moment(
cirq.TwoQubitDiagonalGate([0.1, 0.2, 0.3, 0.4])(q0, q1),
),
cirq.Moment(
cirq.ThreeQubitDiagonalGate([0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.2, 1.3])(
q1, q2, q3
),
),
cirq.Moment(
cirq.CSwapGate()(q0, q3, q1),
),
cirq.Moment(
cirq.rz(0.6)(q0),
cirq.rx(0.7)(q1),
cirq.ry(0.8)(q2),
cirq.rz(0.9)(q3),
),
cirq.Moment(
cirq.TOFFOLI(q3, q2, q0),
),
cirq.Moment(
cirq.FREDKIN(q1, q3, q2),
),
cirq.Moment(
cirq.MatrixGate(
np.array(
[
[0, -0.5 - 0.5j, -0.5 - 0.5j, 0],
[0.5 - 0.5j, 0, 0, -0.5 + 0.5j],
[0.5 - 0.5j, 0, 0, 0.5 - 0.5j],
[0, -0.5 - 0.5j, 0.5 + 0.5j, 0],
]
)
)(q0, q1),
cirq.MatrixGate(
np.array(
[
[0.5 - 0.5j, 0, 0, -0.5 + 0.5j],
[0, 0.5 - 0.5j, -0.5 + 0.5j, 0],
[0, -0.5 + 0.5j, -0.5 + 0.5j, 0],
[0.5 - 0.5j, 0, 0, 0.5 - 0.5j],
]
)
)(q2, q3),
),
cirq.Moment(
cirq.MatrixGate(np.array([[1, 0], [0, 1j]]))(q0),
cirq.MatrixGate(np.array([[0, -1j], [1j, 0]]))(q1),
cirq.MatrixGate(np.array([[0, 1], [1, 0]]))(q2),
cirq.MatrixGate(np.array([[1, 0], [0, -1]]))(q3),
),
cirq.Moment(
cirq.riswap(0.7)(q0, q1),
cirq.givens(1.2)(q2, q3),
),
cirq.Moment(
cirq.H(q0),
cirq.H(q1),
cirq.H(q2),
cirq.H(q3),
),
)
simulator = cirq.Simulator()
cirq_result = simulator.simulate(circuit)
qsim_simulator = qsimcirq.QSimSimulator()
qsim_result = qsim_simulator.simulate(circuit)
assert cirq.linalg.allclose_up_to_global_phase(
qsim_result.state_vector(), cirq_result.state_vector()
)
# Canonicalizes exponent for equality, but keeps the inner details.
assert cirq.Z**0.5 != cirq.Z**-0.5
assert (cirq.Z**-1)**0.5 == cirq.Z**-0.5
assert cirq.Z**-1 == cirq.Z
@pytest.mark.parametrize(
'input_gate, specialized_output',
[
(cirq.Z, cirq.CZ),
(cirq.CZ, cirq.CCZ),
(cirq.X, cirq.CX),
(cirq.CX, cirq.CCX),
(cirq.ZPowGate(exponent=0.5), cirq.CZPowGate(exponent=0.5)),
(cirq.CZPowGate(exponent=0.5), cirq.CCZPowGate(exponent=0.5)),
(cirq.XPowGate(exponent=0.5), cirq.CXPowGate(exponent=0.5)),
(cirq.CXPowGate(exponent=0.5), cirq.CCXPowGate(exponent=0.5)),
],
)
def test_specialized_control(input_gate, specialized_output):
# Single qubit control on the input gate gives the specialized output
assert input_gate.controlled() == specialized_output
assert input_gate.controlled(num_controls=1) == specialized_output
assert input_gate.controlled(
control_values=((1, ), )) == specialized_output
assert input_gate.controlled(control_qid_shape=(2, )) == specialized_output
assert np.allclose(
cirq.unitary(specialized_output),
cirq.unitary(cirq.ControlledGate(input_gate, num_controls=1)),
)
'AsymmetricDepolarizingChannel':
cirq.AsymmetricDepolarizingChannel(0.1, 0.2, 0.3),
'BitFlipChannel':
cirq.BitFlipChannel(0.5),
'Bristlecone':
cirq.google.Bristlecone,
'CCNOT':
cirq.CCNOT,
'CCX':
cirq.CCX,
'CCXPowGate':
cirq.CCXPowGate(exponent=0.123, global_shift=0.456),
'CCZ':
cirq.CCZ,
'CCZPowGate':
cirq.CCZPowGate(exponent=0.123, global_shift=0.456),
'CNOT':
cirq.CNOT,
'CNotPowGate':
cirq.CNotPowGate(exponent=0.123, global_shift=0.456),
'ControlledOperation':
cirq.ControlledOperation(sub_operation=cirq.Y(cirq.NamedQubit('target')),
controls=cirq.LineQubit.range(2),
control_values=[0, 1]),
'ControlledGate':
cirq.ControlledGate(sub_gate=cirq.Y,
num_controls=2,
control_values=[0, 1],
control_qid_shape=(3, 2)),
'CX':
cirq.CX,
