Defining the local part of a hidden variable model: a comment

Details Defining the local part of a hidden variable model: a comment Defining the local part of a hidden variable model: a comment

2009-07-28

arxiv.org/abs/0907.4967v4

Physics

Quantum Physics

2 pages, 1 figure; this concerns arXiv:0801.2218; v2: added response to arXiv:0907.2619v2; v3: added response to arXiv:0907.26

Scientific paper

In [Physical Review Letters 101, 050403 (2008)], we showed that quantum theory cannot be explained by a hidden variable model with a non-trivial local part. The purpose of this comment is to clarify our notion of local part, which seems to have caused some confusion in the recent literature. This notion is based on Bell's and demands that local hidden variables are physical, the idea being that, if discovered, they would not contradict basic physical principles. We explain why the recent supposed "counterexamples" that have appeared are not counterexamples to our theorem--in fact they are based on a definition of local hidden variables which would allow signalling and is therefore not physical.

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