qiskit.circuit.QuantumCircuit.control

QuantumCircuit.control(num_ctrl_qubits=1, label=None, ctrl_state=None)

Control this circuit on num_ctrl_qubits qubits.

Parameter

• 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.

Rückgabe

The controlled version of this circuit.

Rückgabetyp

QuantumCircuit

Verursacht

CircuitError – If the circuit contains a non-unitary operation and cannot be controlled.