def _unitary_(self) -> Union[np.ndarray, NotImplementedType]:
qubits = cirq.LineQid.for_gate(self)
op = self.sub_gate.on(*qubits[self.num_controls():])
c_op = cop.ControlledOperation(qubits[:self.num_controls()], op,
self.control_values)
return protocols.unitary(c_op, default=NotImplemented)
def _apply_unitary_(self, args: protocols.ApplyUnitaryArgs) -> np.ndarray:
qubits = cirq.LineQubit.range(self.num_controls() +
self.sub_gate.num_qubits())
op = self.sub_gate.on(*qubits[self.num_controls():])
c_op = cop.ControlledOperation(qubits[:self.num_controls()], op)
return protocols.apply_unitary(c_op, args, default=NotImplemented)
def _apply_unitary_(self,
args: 'protocols.ApplyUnitaryArgs') -> np.ndarray:
qubits = cirq.LineQid.for_gate(self)
op = self.sub_gate.on(*qubits[self.num_controls():])
c_op = cop.ControlledOperation(qubits[:self.num_controls()], op,
self.control_values)
return protocols.apply_unitary(c_op, args, default=NotImplemented)
def _decompose_(self, qubits):
result = protocols.decompose_once_with_qubits(self.sub_gate,
qubits[1:],
NotImplemented)
if result is NotImplemented:
return NotImplemented
return [cop.ControlledOperation(qubits[0], op) for op in result]
def on(self, *qubits: 'cirq.Qid') -> cop.ControlledOperation:
if len(qubits) == 0:
raise ValueError("Applied a gate to an empty set of qubits. Gate: {!r}".format(self))
self.validate_args(qubits)
return cop.ControlledOperation(
qubits[: self.num_controls()],
self.sub_gate.on(*qubits[self.num_controls() :]),
self.control_values,
)
def _decompose_(self, qubits):
result = protocols.decompose_once_with_qubits(
self.sub_gate, qubits[self.num_controls():], NotImplemented)
if result is NotImplemented:
return NotImplemented
decomposed = []
for op in result:
decomposed.append(
cop.ControlledOperation(qubits[:self.num_controls()], op))
return decomposed
def _decompose_(self, qubits):
if isinstance(self.sub_gate, matrix_gates.MatrixGate):
# Default decompositions of 2/3 qubit `cirq.MatrixGate` ignores global phase, which is
# local phase in the controlled variant and hence cannot be ignored.
return NotImplemented
result = protocols.decompose_once_with_qubits(
self.sub_gate, qubits[self.num_controls():], NotImplemented)
if result is NotImplemented:
return NotImplemented
decomposed: List['cirq.Operation'] = []
for op in result:
decomposed.append(
cop.ControlledOperation(qubits[:self.num_controls()], op,
self.control_values))
return decomposed
def on(self, *qubits: raw_types.Qid) -> cop.ControlledOperation:
if len(qubits) == 0:
raise ValueError(
"Applied a gate to an empty set of qubits. Gate: {!r}".format(
self))
self.validate_args(qubits)
# Merge specified controls and new controls.
merged_controls = []
remaining_qubits = list(qubits)
for control in self.control_qubits:
if control is None:
merged_controls.append(remaining_qubits.pop(0))
else:
merged_controls.append(control)
return cop.ControlledOperation(merged_controls,
self.sub_gate.on(*remaining_qubits))
