Wednesday, July 17, 2013

1307.4365 (Nicola Vona et al.)

Sharpening the Implications of Bell's Theorem    [PDF]

Nicola Vona, Yeong-Cherng Liang
Bell's theorem is a fundamental theorem in physics concerning the incompatibility between some predictions of quantum theory and a large class of physical theories. In this paper, we make use of a recent result by Colbeck and Renner [Nat. Commun. 2, 411 (2011)] to make explicit the implications of Bell's theorem. In particular, under the assumption that it is possible to explain the correlations of the data collected in many runs of a Bell experiment in terms of what happens in each single run, we show that any physical theory that accounts for the mentioned quantum correlations within spacetime must necessarily involve some nonlocal feature.
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