Quantum Computing Questions
The swap gate, also known as the CNOT gate or controlled-not gate, is a fundamental gate in quantum computing. It is a two-qubit gate that exchanges the states of two qubits. When applied to a quantum system, the swap gate swaps the states of the target qubit with the control qubit. It is commonly represented by the matrix:
[[1, 0, 0, 0],
[0, 0, 1, 0],
[0, 1, 0, 0],
[0, 0, 0, 1]]
The swap gate is essential for various quantum algorithms and protocols, such as quantum teleportation and quantum error correction.