Quantum nonlocality via local contextuality with qubit-qubit entanglement

Debashis Saha , Adan Cabello , Sujit K. Choudhary , Marcin Pawłowski

Abstract

Quantum nonlocality can be revealed “via local contextuality” in qudit-qudit entangled systems with d>2, that is, through the violation of inequalities containing Alice-Bob correlations that admit a local description, and Alice-Alice correlations (between the results of sequences of measurements on Alice's subsystem) that admit a local (but contextual) description. A fundamental question to understand the respective roles of entanglement and local contextuality is whether nonlocality via local contextuality exists when the parties have only qubit-qubit entanglement. Here we respond affirmatively to this question. This result further clarifies the connection between contextuality and nonlocality and opens the door for observing nonlocality via local contextuality in actual experiments.
Author Debashis Saha (FMPI / ITPA)
Debashis Saha ,,
- Institute of Theoretical Physics and Astrophysics
, Adan Cabello
Adan Cabello,,
-
, Sujit K. Choudhary
Sujit K. Choudhary,,
-
, Marcin Pawłowski (FMPI / ITPA)
Marcin Pawłowski,,
- Institute of Theoretical Physics and Astrophysics
Journal seriesPhysical Review A, ISSN 1050-2947, (A 35 pkt)
Issue year2016
Vol93
No4
Pages1-5
Publication size in sheets0.5
DOIDOI:10.1103/PhysRevA.93.042123
URL http://journals.aps.org/pra/pdf/10.1103/PhysRevA.93.042123
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 29-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 29-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.925 (2) - 2016=2.716 (5)
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