Entanglement’s Benefit Survives an Entanglement-Breaking Channel
Author(s)Zhang, Zheshen; Tengner, Maria; Zhong, Tian; Wong, Franco N. C.; Shapiro, Jeffrey H.
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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.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
Physical Review Letters
American Physical Society
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
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