8 / 10 Multi-Qubit Circuits

Two-qubit control

Why are CNOT gates important in quantum circuits?

A

They are the only gates that can act on more than one qubit at once

B

They copy the control qubit's unknown state onto the target qubit

C

They can create entanglement when the control qubit is in superposition

D

They measure the control qubit and then flip the target on outcome 1