Wydarzenia

Seminarium Instytutu Fizyki Teoretycznej Uniwersytetu Wrocławskiego

Role of multipartite entanglement in quantum teleportation

dr Artur Barasiński

Palacky University

Quantum teleportation is considered as one of the major protocols in quantum information science. By exploiting the physical resource of entanglement, quantum teleportation has played a prominent role in the development of quantum information theory and represents a fundamental ingredient to the progress of many quantum technologies. Although quantum teleportation is a typically bipartite process, it can be extended to multipartite quantum protocols. An important example of such extension is known as the controlled quantum teleportation which forms a backbone of quantum teleportation network, a prelude for a genuine quantum Internet. It is commonly believed that controlled teleportation (and quantum teleportation network) is a clear manifestation of multipartite entanglement and both protocols involve pre-sharing a genuine multipartite entangled resource. In my presentation, I will discuss the role of multipartite entanglement in controlled quantum teleportation. In particular, I shall present a counterintuitive result of successful controlled teleportation performed without multipartite entanglement what disproves the current misconception.