A Close Look at the EPR Data of Weihs et al

Details A Close Look at the EPR Data of Weihs et al A Close Look at the EPR Data of Weihs et al

2009-06-27

arxiv.org/abs/0906.5093v1

Physics

Quantum Physics

17 pages

Scientific paper

I examine data from EPR experiments conducted in 1997 through 1999 by Gregor Weihs and colleagues. They used detection windows of 4-6 ns to identify coincidences; I find that one obtains better results with windows 40-50 ns wide. Coincidences identified using different windows have substantially different distributions over the sixteen combinations of Alice's and Bob's measurement settings and results, which is the essence of the coincidence time loophole. However, wide and narrow window coincidences violate a Bell inequality equally strongly. The wider window yields substantially smaller violations of no-signaling conditions.

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