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All Entangled States can Demonstrate Nonclassical Teleportation

Daniel Cavalcanti, Paul Skrzypczyk, and Ivan Šupić
Phys. Rev. Lett. 119, 110501 – Published 12 September 2017; Erratum Phys. Rev. Lett. 119, 199902 (2017)
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Abstract

Quantum teleportation, the process by which Alice can transfer an unknown quantum state to Bob by using preshared 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 cannot be reproduced classically. We introduce the idea of nonclassical 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.

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  • Received 30 May 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.110501

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Erratum

Erratum: All Entangled States Can Demonstrate Nonclassical Teleportation [Phys. Rev. Lett. 119, 110501 (2017)]

Daniel Cavalcanti, Paul Skrzypczyk, and Ivan Šupić
Phys. Rev. Lett. 119, 199902 (2017)

Authors & Affiliations

Daniel Cavalcanti1,*, Paul Skrzypczyk2, and Ivan Šupić1

  • 1ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
  • 2H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom

  • *daniel.cavalcanti@icfo.es

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Issue

Vol. 119, Iss. 11 — 15 September 2017

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