gill1109 wrote:I put a paper on arXiv in which I show what correlation functions can be produced by simple “local hidden variables”. https://arxiv.org/abs/1312.6403. The triangle wave versus the cosine (how to optimally approximate EPR-B Correlations by classical systems)
Richard D. Gill
(Submitted on 22 Dec 2013 (v1), last revised 27 Dec 2013 (this version, v2))
The famous singlet correlations of a composite quantum system consisting of two spatially separated components exhibit notable features of two kinds. The first kind are striking certainty relations: perfect correlation and perfect anti-correlation in certain settings. The second kind are a number of symmetries, in particular, invariance under rotation, as well as invariance under exchange of components, parity, or chirality. In this note I investigate the class of correlation functions that can be generated by classical composite physical systems when we restrict attention to systems which reproduce the certainty relations exactly, and for which the rotational invariance of the correlation function is the manifestation of rotational invariance of the underlying classical physics. I call such correlation functions classical EPR-B correlations. It turns out that the other three (binary) symmetries can then be obtained for free: they are exhibited by the correlation function, and can be imposed on the underlying physics by adding an underlying randomisation level. We end up with a simple probabilistic description of all possible classical EPR-B correlations in terms of a ``spinning coloured disk'' model, and a research programme: describe these functions in a concise analytic way.
I’m a bit fed up that no one seems to bother to read it.
I guess you mean that no one has commented on it yet. It is a bit hard to follow. I'm trying to study it.