Ontological models predictively inequivalent to quantum theory

Recently, it has been argued that no extension of quantum theory can have improved predictive power under a strong assumption of free choice of the experimental settings and validity of quantum mechanics. Here, under a different free choice assumption, we describe a model which violates this stateme...

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Bibliographic Details
Published in:Physical review letters 2013-04, Vol.110 (17), p.170404-170404, Article 170404
Main Authors: Ghirardi, GianCarlo, Romano, Raffaele
Format: Article
Language:English
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Summary:Recently, it has been argued that no extension of quantum theory can have improved predictive power under a strong assumption of free choice of the experimental settings and validity of quantum mechanics. Here, under a different free choice assumption, we describe a model which violates this statement for almost all states of a bipartite two-level system, in a possibly experimentally testable way. From consistency with quantum mechanics and the nonsignaling principle, we derive a bound on the local averages for the family of deterministic ontological theories that our model belongs to.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.170404