# Multi-Qubit Gates

Let's take a look at how qubits can interact with each other using multi-qubit gates.

## We'll cover the following

## Controlled operations

Controlled operations are the most basic way in which two qubits can interact with each other. Basically, a gate is applied to one qubit based on the current state of the other qubit. The operation can be anything like the X, Y, Z gates. Let’s try to understand with the help of an example.

### CNOT gate

This is the **controlled-NOT** gate. It is a two-qubit gate. It performs a bit flip operation on the target qubit only when the control qubit is $|1\rangle$. This is quite similar to the **XOR** gate from classical computing.

Now, what are target and control qubits? We’ll have to understand this by looking at the circuit diagram for it.

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