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Bell inequalities with no quantum violation and unextendible product bases
Augusiak, R. (Institut de Ciències Fotòniques (Castelldefels, Catalunya))
Stasinska, Julia (Universitat Autònoma de Barcelona. Departament de Física)
Hadley, C. (Institut de Ciències Fotòniques (Castelldefels, Catalunya))
Korbicz, J. K. (Institut de Ciències Fotòniques (Castelldefels, Catalunya))
Lewenstein, Maciej (Institut de Ciències Fotòniques (Castelldefels, Catalunya))
Acín, Antonio (Institut de Ciències Fotòniques (Castelldefels, Catalunya))
American Physical Society

Data: 2011
Resum: The strength of classical correlations is subject to certain constraints, commonly known as Bell inequalities. Violation of these inequalities is the manifestation of nonlocality—displayed, in particular, by quantum mechanics, meaning that quantum mechanics can outperform classical physics at tasks associated with such Bell inequalities. Interestingly, however, there exist situations in which this is not the case. We associate an intriguing class of bound entangled states, constructed from unextendable product bases with a wide family of tasks, for which (i) quantum correlations do not outperform the classical ones but (ii) there exist supraquantum nonsignaling correlations that do provide an advantage.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; publishedVersion
Publicat a: Physical review letters, Vol. 107, Issue 7 (August 2011) , p. 70401, ISSN 0031-9007

DOI: 10.1103/PhysRevLett.107.070401

5 p, 160.9 KB

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