Quantum Teleportation II and Entanglement Swapping

In the last chapter, we introduced a simplified version of quantum teleportation in which an ideal CNOT gate that can act over a very long distance needs to be created. In this chapter, we show its full version and its implementation. We then study entanglement swapping that utilizes the quantum teleportation circuit. Both circuits are implemented in IBM-Q and their hardware results are shown. The role and operations of the classical registers in IBM-Q are discussed.