Phys. Rev. A 65, 022105 (2002) [5 pages]Existential contextuality and the models of Meyer, Kent, and CliftonReceived 25 June 2000; published 10 January 2002 It is shown that the models recently proposed by Meyer, Kent, and Clifton (MKC) exhibit a novel kind of contextuality, which we term existential contextuality. In this phenomenon it is not simply the pre-existing value but the actual existence of an observable which is context dependent. This result confirms the point made elsewhere, that the MKC models do not, as the authors claim, “nullify” the Kochen-Specker theorem. It may also be of some independent interest. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.022105
DOI:
10.1103/PhysRevA.65.022105
PACS:
03.65.Ta, 03.67.Hk, 03.67.Lx
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