Multi-Qubit Gates
Operations that affect two or more qubits simultaneously are called multi-qubit gates. The Controlled-NOT (CNOT) gate, which is comparable to the conventional XOR gate, is a significant multi-qubit gate. If the control qubit is in the state |1, the CNOT gate flips the target qubit. This gate is a fundamental component of entanglement formation and quantum computation. These types of multi-qubit gates are very important as they increase the fidelity of many quantum operations, but also leads to better implications of entanglement, given that the entanglement of qubits can be processed together and also parallelism.