What does the SWAP gate do?

Question: What does a SWAP gate do? A) Exchanges the states of two qubits B) Measures two qubits at once C) Deletes a qubit from the circuit D) Creates a new qubit from nothing Correct: A Explanation: A SWAP gate exchanges the quantum states of two qubits. It is often useful during circuit compilation when two-qubit operations must be routed through connected hardware qubits. Topic: quantum computing / SWAP gate / routing