Ontological models predictively inequivalent to quantum theory - PubMed (original) (raw)
Ontological models predictively inequivalent to quantum theory
GianCarlo Ghirardi et al. Phys Rev Lett. 2013.
Abstract
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.
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