All bipartite entangled states display some hidden nonlocality

Masanes, Lluís, Liang, Yeong-Cherng and Doherty, Andrew C. (2008) All bipartite entangled states display some hidden nonlocality. Physical Review Letters, 100 9: 090403-1-090403-4. doi:10.1103/PhysRevLett.100.090403

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Author Masanes, Lluís
Liang, Yeong-Cherng
Doherty, Andrew C.
Title All bipartite entangled states display some hidden nonlocality
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2008-03-04
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.100.090403
Open Access Status File (Publisher version)
Volume 100
Issue 9
Start page 090403-1
End page 090403-4
Total pages 4
Editor G. Basbas
J. Sandweiss
R. B. Schuhmann
S. G. Brown
Place of publication United States
Publisher American Physical Society
Collection year 2009
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
020699 Quantum Physics not elsewhere classified
Abstract One of the most significant and well-known properties of entangled states is that they may lead to violations of Bell inequalities and are thus inconsistent with any local-realistic theory. However, there are entangled states that cannot violate any Bell inequality, and in general the precise relationship between entanglement and observable nonlocality is not well understood. We demonstrate that a violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality can be demonstrated in a certain kind of Bell experiment for all entangled states. Our proof of the result consists of two main steps. We first provide a simple characterization of the set of states that do not violate the CHSH inequality even after general local operations and classical communication. Second, we prove that for each entangled state , there exists another state not violating the CHSH inequality, such that violates the CHSH inequality.
Keyword Quantum Nonlocality
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 39 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 37 times in Scopus Article | Citations
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Created: Fri, 17 Apr 2009, 15:53:21 EST by Jo Hughes on behalf of School of Mathematics & Physics