Almost quantum correlations

Date
2015
Authors
Navascués, M.
Guryanova, Y.
Hoban, M.J.
Acín, A.
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Source Title
Nature Communications
Print ISSN
20411723
Electronic ISSN
Publisher
Nature Publishing Group
Volume
6
Issue
Pages
Language
English
Type
Article
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Abstract

Quantum theory is not only successfully tested in laboratories every day but also constitutes a robust theoretical framework: small variations usually lead to implausible consequences, such as faster-than-light communication. It has even been argued that quantum theory may be special among possible theories. Here we report that, at the level of correlations among different systems, quantum theory is not so special. We define a set of correlations, dubbed 'almost quantum', and prove that it strictly contains the set of quantum correlations but satisfies all-but-one of the proposed principles to capture quantum correlations. We present numerical evidence that the remaining principle is satisfied too. © 2015 Macmillan Publishers Limited.

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Keywords
correlation, quantum mechanics, theoretical study, Article, conceptual framework, correlational study, mathematical analysis, mathematical computing, measurement precision, probability, quantum theory, structure analysis
Citation
Published Version (Please cite this version)