Entanglement's benefit survives an entanglement-breaking channel

Zheshen Zhang, Maria Tengner, Tian Zhong, Franco N.C. Wong, Jeffrey H. Shapiro

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


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.

Original languageEnglish (US)
Article number010501
JournalPhysical review letters
Issue number1
StatePublished - Jul 1 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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