11. Gates: CNOT

Controlled-NOT (CNOT)

The Entanglement Creator.

This is a two-qubit gate. It flips the Target qubit if and only if the Control qubit is $|1\rangle$.

If the control qubit is in superposition ($|0\rangle + |1\rangle$), the target becomes entangled with it, creating the state $|00\rangle + |11\rangle$.