control(num_ctrl_qubits=1, label=None, ctrl_state=None)¶
Control this circuit on
num_ctrl_qubits (int) – The number of control qubits.
label (str) – An optional label to give the controlled operation for visualization.
ctrl_state (str or int) – The control state in decimal or as a bitstring (e.g. ‘111’). If None, use
2**num_ctrl_qubits - 1.
The controlled version of this circuit.
- Return type
CircuitError – If the circuit contains a non-unitary operation and cannot be controlled.