Entanglement’s Benefit Survives an Entanglement-Breaking Channel
Name
Zhang-2013-Entanglement’s Benefit Survives an Entanglement-Breaking Channel.pdf
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Author(s)
Zhang, Zheshen
Tengner, Maria
Zhong, Tian
Wong, Franco N. C.
Shapiro, Jeffrey H.
Date Issued
July 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Zhang, Zheshen, Maria Tengner, Tian Zhong, Franco N. C. Wong, and Jeffrey H. Shapiro. “Entanglement’s Benefit Survives an Entanglement-Breaking Channel.” Physical Review Letters 111, no. 1 (July 2013). © 2013 American Physical Society
Version
Final published version
Abstract
Entanglement is essential to many quantum information applications, but it is easily destroyed by quantum decoherence arising from interaction with the environment. We report the first experimental demonstration of an entanglement-based protocol that is resilient to loss and noise which destroy entanglement. Specifically, despite channel noise 8.3 dB beyond the threshold for entanglement breaking, eavesdropping-immune communication is achieved between Alice and Bob when an entangled source is used, but no such immunity is obtainable when their source is classical. The results prove that entanglement can be utilized beneficially in lossy and noisy situations, i.e., in practical scenarios.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.010501
