Talk:GHZ experiment

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A couple of questions:

1. Why should there necessarily be only the one hidden variable λ? In a paper I've just glanced through (Greenberger, Daniel M, “Two-particle versus three-particle EPR experiments”, Annals of the New York Academy of Sciences 755, 585-599 (1995)) they allow for three hidden variables, though (for some reason I have not yet fathomed) restricted so that the sum is zero.

2. Has the QM prediction been experimentally verified?

Caroline Thompson 18:02, 20 Aug 2004 (UTC)

[edit] Actual experiments

This experiment has taken place (at least once!). Here is one: http://arxiv.org/abs/quant-ph/9810035

Here is a local hidden variable theory that creeps in through error in a real experiment (where the simultaneous eigenstate cannot be obtained, only an approximate eigenstate obtained) http://arxiv.org/pdf/quant-ph/0007102

And here is an analysis of the results of the experiment, that claims to eliminate the possibility of a LHVT explaining the results of that experiment http://arxiv.org/pdf/quant-ph/9811013