def control(
self,
num_ctrl_qubits: int = 1,
label: Optional[str] = None,
ctrl_state: Optional[Union[str, int]] = None,
):
"""Controlled version of this gate.
Args:
num_ctrl_qubits (int): number of control qubits.
label (str or None): An optional label for the gate [Default: None]
ctrl_state (int or str or None): control state expressed as integer,
string (e.g. '110'), or None. If None, use all 1s.
Returns:
ControlledGate: controlled version of this gate.
"""
ctrl_state = _ctrl_state_to_int(ctrl_state, num_ctrl_qubits)
new_ctrl_state = (self.ctrl_state << num_ctrl_qubits) | ctrl_state
gate = MCU1Gate(
self.params[0],
num_ctrl_qubits=num_ctrl_qubits + self.num_ctrl_qubits,
label=label,
ctrl_state=new_ctrl_state,
)
gate.base_gate.label = self.label
return gate
def control(self, num_ctrl_qubits=1, label=None, ctrl_state=None):
"""Return a controlled-X gate with more control lines.
Args:
num_ctrl_qubits (int): number of control qubits.
label (str or None): An optional label for the gate [Default: None]
ctrl_state (int or str or None): control state expressed as integer,
string (e.g. '110'), or None. If None, use all 1s.
Returns:
ControlledGate: controlled version of this gate.
"""
ctrl_state = _ctrl_state_to_int(ctrl_state, num_ctrl_qubits)
new_ctrl_state = (self.ctrl_state << num_ctrl_qubits) | ctrl_state
gate = MCXGate(num_ctrl_qubits=num_ctrl_qubits + 1, label=label, ctrl_state=new_ctrl_state)
gate.base_gate.label = self.label
return gate
