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      Almost quantum correlations

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      Author
      Navascués, M.
      Guryanova, Y.
      Hoban, M.J.
      Acín, A.
      Date
      2015
      Source Title
      Nature Communications
      Print ISSN
      20411723
      Publisher
      Nature Publishing Group
      Volume
      6
      Language
      English
      Type
      Article
      Item Usage Stats
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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.
      Keywords
      correlation
      quantum mechanics
      theoretical study
      Article
      conceptual framework
      correlational study
      mathematical analysis
      mathematical computing
      measurement precision
      probability
      quantum theory
      structure analysis
      Permalink
      http://hdl.handle.net/11693/22447
      Published Version (Please cite this version)
      http://dx.doi.org/10.1038/ncomms7288
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