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Observation of Genuine One-Way Einstein-Podolsky-Rosen Steering

Sabine Wollmann, Nathan Walk, Adam J. Bennet, Howard M. Wiseman, and Geoff J. Pryde
Phys. Rev. Lett. 116, 160403 – Published 21 April 2016
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Abstract

Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering is distinguished from both entanglement and Bell nonlocality by its asymmetry—there exist conditions where the steering phenomenon changes from being observable to not observable, simply by exchanging the role of the two measuring parties. While this one-way steering feature has been previously demonstrated for the restricted class of Gaussian measurements, for the general case of positive-operator-valued measures even its theoretical existence has only recently been settled. Here, we prove, and then experimentally observe, the one-way steerability of an experimentally practical class of entangled states in this general setting. As well as its foundational significance, the demonstration of fundamentally asymmetric nonlocality also has practical implications for the distribution of the trust in quantum communication networks.

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  • Received 3 November 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.160403

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalGeneral PhysicsQuantum Information, Science & Technology

Synopsis

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One-Way Quantumness

Published 21 April 2016

Experiments provide evidence for one-way quantum steering—an effect by which distant entangled systems can influence one another in a directional way.

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Authors & Affiliations

Sabine Wollmann1, Nathan Walk1,2, Adam J. Bennet1, Howard M. Wiseman1, and Geoff J. Pryde1,*

  • 1Centre for Quantum Computation and Communication Technology and Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
  • 2Department of Computer Science, University of Oxford, Oxford OX1 3QD, United Kingdom

  • *g.pryde@griffith.edu.au

See Also

Experimental Quantification of Asymmetric Einstein-Podolsky-Rosen Steering

Kai Sun, Xiang-Jun Ye, Jin-Shi Xu, Xiao-Ye Xu, Jian-Shun Tang, Yu-Chun Wu, Jing-Ling Chen, Chuan-Feng Li, and Guang-Can Guo
Phys. Rev. Lett. 116, 160404 (2016)

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Issue

Vol. 116, Iss. 16 — 22 April 2016

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