Affiliation:
1. The University of Tokyo , Bunkyo-ku, Tokyo 113-8654, Japan
2. The University of Tokyo , Bunkyo-ku, Tokyo 113-8654, Japan RIKEN Center for Quantum Computing, Wako, Saitama 351-0198, Japan
Abstract
Quantum teleportation is the most basic quantum protocol that transfers quantum states between two parties via sharing of quantum entanglement, measurements, and feedforward operations. At first glance, quantum teleportation is simply an identity operation that does not change the quantum states. Quantum teleportation, however, forms the basis for a paradigm of quantum computation called measurement-based quantum computation (MBQC). In the first half of this chapter, we describe continuous-variable (CV) quantum teleportation. In the second half, we explain how to use quantum teleportation in MBQC. There are two important concepts regarding MBQC: cluster state and gate teleportation. Cluster state is a multipartite entangled state that can be used for CV quantum computation, given that we can implement appropriate measurements and feedforward operations on it. Gate teleportation, on the other hand, is a concept that we can “teleport” non-Gaussian operations on the resource state to the input state.
Publisher
AIP Publishing LLCMelville, New York