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Entanglement-Enhanced Classical Communication Over a Noisy Classical Channel

R. Prevedel, Y. Lu, W. Matthews, R. Kaltenbaek, and K. J. Resch
Phys. Rev. Lett. 106, 110505 – Published 14 March 2011
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Abstract

We present and experimentally demonstrate a communication protocol that employs shared entanglement to reduce errors when sending a bit over a particular noisy classical channel. Specifically, it is shown that given a single use of this channel, one can transmit a bit with higher success probability when the sender and receiver share entanglement compared to the best possible strategy when they do not. The experiment is realized using polarization-entangled photon pairs, whose quantum correlations play a critical role in both the encoding and decoding of the classical message. Experimentally, we find that a bit can be successfully transmitted with probability 0.891±0.002, which is close to the theoretical maximum of (2+21/2)/30.902 and is significantly above the optimal classical strategy, which yields 5/60.833.

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  • Received 8 October 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.110505

© 2011 American Physical Society

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Published 14 March 2011

Entanglement, a crucial resource in quantum information theory, can also improve communication over a classical channel.

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Authors & Affiliations

R. Prevedel*, Y. Lu, W. Matthews, R. Kaltenbaek, and K. J. Resch

  • Institute for Quantum Computing, University of Waterloo, Waterloo, N2L 3G1, ON, Canada

  • *robert.prevedel@iqc.ca
  • kresch@iqc.ca

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Issue

Vol. 106, Iss. 11 — 18 March 2011

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