A Close Look at the EPR Data of Weihs et al

2009/06/27 by James H. Bigelow, Bigelow, James H.
Biochemistry, Genetics and Molecular Biology · Chemistry · Medicine · Physics and Astronomy · #Advanced NMR Techniques and Applications #Biofield Effects and Biophysics #Electron Spin Resonance Studies #quant-ph

paper · pdf · doi:10.48550/arxiv.0906.5093

17 pages

arxiv created 2009/06/27 · arxiv updated 2009/12/01

Abstract

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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