Quantum nonlocality via local contextuality with qubit-qubit entanglement

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


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 IFTiA
Debashis Saha ,,
- Institute of Theoretical Physics and Astrophysics
, Adan Cabello
Adan Cabello,,
, Sujit K. Choudhary
Sujit K. Choudhary,,
, Marcin Pawłowski IFTiA
Marcin Pawłowski,,
- Institute of Theoretical Physics and Astrophysics
Journal seriesPhysical Review A, ISSN 1050-2947
Issue year2016
Publication size in sheets0.5
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)
Citation count*0
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.