Monday, July 1, 2013

1306.6801 (William N. Plick et al.)

An explicit contextualized hidden variable model replicating an
indivisible quantum system
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William N. Plick, Radek Lapkiewicz
Recent experiments and theory have further illuminated the concept of "quantum contextuality". In this paper we take an inequality - the Pentagram (or KCBS) inequality, which is violated by an unentangled spin-1 system - and given a relaxed assumption of non-contextuality show that a hidden variable model may be constructed that replicates exactly the quantum bound. This is in contrast to the case of an entangled pair of spin-1/2 particles where a similar relaxation of the assumption of locality does not lead to a replication of the quantum bound. Some reasons are proposed for why this may be the case.
View original: http://arxiv.org/abs/1306.6801

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