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Conclusive Experimental Demonstration of One-Way Einstein-Podolsky-Rosen Steering

Nora Tischler, Farzad Ghafari, Travis J. Baker, Sergei Slussarenko, Raj B. Patel, Morgan M. Weston, Sabine Wollmann, Lynden K. Shalm, Varun B. Verma, Sae Woo Nam, H. Chau Nguyen, Howard M. Wiseman, and Geoff J. Pryde
Phys. Rev. Lett. 121, 100401 – Published 7 September 2018
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Abstract

Einstein-Podolsky-Rosen steering is a quantum phenomenon wherein one party influences, or steers, the state of a distant party’s particle beyond what could be achieved with a separable state, by making measurements on one-half of an entangled state. This type of quantum nonlocality stands out through its asymmetric setting and even allows for cases where one party can steer the other but where the reverse is not true. A series of experiments have demonstrated one-way steering in the past, but all were based on significant limiting assumptions. These consisted either of restrictions on the type of allowed measurements or of assumptions about the quantum state at hand, by mapping to a specific family of states and analyzing the ideal target state rather than the real experimental state. Here, we present the first experimental demonstration of one-way steering free of such assumptions. We achieve this using a new sufficient condition for nonsteerability and, although not required by our analysis, using a novel source of extremely high-quality photonic Werner states.

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  • Received 31 May 2018
  • Revised 2 August 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.100401

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & TechnologyGeneral Physics

Authors & Affiliations

Nora Tischler1, Farzad Ghafari1, Travis J. Baker1, Sergei Slussarenko1, Raj B. Patel1,2, Morgan M. Weston1, Sabine Wollmann1,3, Lynden K. Shalm4, Varun B. Verma4, Sae Woo Nam4, H. Chau Nguyen5, Howard M. Wiseman1, and Geoff J. Pryde1,*

  • 1Centre for Quantum Computation and Communication Technology (Australian Research Council), Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
  • 2Centre for Quantum Computation and Communication Technology (Australian Research Council), Quantum Photonics Laboratory, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
  • 3Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1FD, United Kingdom
  • 4National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
  • 5Naturwissenschaftlich-Technische Fakultät, Universität Siegen, Walter-Flex-Straße 3, D-57068 Siegen, Germany

  • *g.pryde@griffith.edu.au

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Issue

Vol. 121, Iss. 10 — 7 September 2018

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