Existential Contextuality and the Models of Meyer, Kent and Clifton

Details Existential Contextuality and the Models of Meyer, Kent and Clifton Existential Contextuality and the Models of Meyer, Kent and Clifton

2000-05-15

arxiv.org/abs/quant-ph/0005056v4

Phys.Rev. A65 (2002) 022105

Physics

Quantum Physics

Revtex, 7 pages, 1 figure. Replaced with published version

Scientific paper

10.1103/PhysRevA.65.022105

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.

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