All entangled states can demonstrate non-classical teleportation

Daniel Cavalcanti, Paul Skrzypczyk, Ivan Supic

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)
310 Downloads (Pure)

Abstract

Quantum teleportation, the process by which Alice can transfer an unknown quantum state to Bob by using pre-shared entanglement and classical communication, is one of the cornerstones of quantum information. The standard benchmark for certifying quantum teleportation consists in surpassing the maximum average fidelity between the teleported and the target states that can be achieved classically. According to this figure of merit, not all entangled states are useful for teleportation. Here we propose a new benchmark that uses the full information available in a teleportation experiment and prove that all entangled states can implement a quantum channel which can not be reproduced classically. We introduce the idea of non-classical teleportation witness to certify if a teleportation experiment is genuinely quantum and discuss how to quantify this phenomenon. Our work provides new techniques for studying teleportation that can be immediately applied to certify the quality of quantum technologies.
Original languageEnglish
Article number110501
Number of pages5
JournalPhysical Review Letters
Volume119
DOIs
Publication statusPublished - 12 Sep 2017

Structured keywords

  • QITG
  • Bristol Quantum Information Institute

Keywords

  • Quantum channel
  • Quantum entanglement
  • Quantum teleportation

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