Bell's theorem without the hypothesis of locality

One of the Bell’s assumptions in the original derivation of his inequalities was the hypothesis of locality, i.e., of the absence of the influence of two remote measuring instruments on one another. That is why violations of these inequalities observed in experiments are often interpreted as a manifestation of the nonlocal nature of quantum mechanics, or a refutation of local realism. In this paper, Bell’s inequality is derived in its traditional form, without resorting to the hypothesis of locality, the only assumption being that the probability distributions are nonnegative. These probability distributions are calculated, for a specific optical experiment, in the framework of quantum theory and it is shown that they can take on negative values. This can therefore be regarded as a rigorous proof that the hypothesis of locality is not relevant to violations of Bell’s inequalities. The physical meaning of the obtained results is examined.

PACS: 03.65.Bz
DOI: 10.1070/PU1994v037n02ABEH000009
URL: https://ufn.ru/en/articles/1994/2/d/
Web of Science

A1994NB28300004
Citation: Belinskii A V "Bell's theorem without the hypothesis of locality" Phys. Usp. 37 219–222 (1994)

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Оригинал: Белинский А В «Теорема Белла без предположения о локальности» УФН 164 231–234 (1994); DOI: 10.3367/UFNr.0164.199402d.0231

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