Experimental Semi-Device-Independent Certification of Entangled Measurements

Adam Bennet, Tamás Vértesi, Dylan J. Saunders, Nicolas Brunner, and G. J. Pryde
Phys. Rev. Lett. 113, 080405 – Published 22 August 2014
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Abstract

Certifying the entanglement of quantum states with Bell inequalities allows one to guarantee the security of quantum information protocols independently of imperfections in the measuring devices. Here, we present a similar procedure for witnessing entangled measurements, which play a central role in many quantum information tasks. Our procedure is termed semi-device-independent, as it uses uncharacterized quantum preparations of fixed Hilbert space dimension. Using a photonic setup, we experimentally certify an entangled measurement using only measurement statistics. We also apply our techniques to certify unentangled but nevertheless inherently quantum measurements.

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  • Received 3 April 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.080405

© 2014 American Physical Society

Authors & Affiliations

Adam Bennet1, Tamás Vértesi2, Dylan J. Saunders1,3, Nicolas Brunner4,†, and G. J. Pryde1,*

  • 1Centre for Quantum Dynamics and Centre for Quantum Computation and Communication Technology, Griffith University, Brisbane, Queensland 4111, Australia
  • 2Institute for Nuclear Research, Hungarian Academy of Sciences, P.O. Box 51, H-4001 Debrecen, Hungary
  • 3Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 4Département de Physique Théorique, Université de Genève, 1211 Genève, Switzerland

  • *g.pryde@griffith.edu.au
  • Nicolas.Brunner@unige.ch

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Issue

Vol. 113, Iss. 8 — 22 August 2014

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