Thursday, July 25, 2013

1307.6475 (Johannes Kofler et al.)

On 'Bell violation using entangled photons without the fair-sampling

Johannes Kofler, Sven Ramelow, Marissa Giustina, Anton Zeilinger
A recent experiment presented, for photons, the first violation of a Bell inequality closing the fair-sampling loophole, i.e., without having to assume that the sample of measured photons fairly represents the entire ensemble. In this note, we discuss a detailed quantum mechanical model for the experimental data. Within experimental error the experiment agrees with quantum mechanical prediction. We also discuss the effects of drifting laser intensity and show that it could not have mimicked a violation of the Bell inequality. Therefore, the experiment was immune to the "production-rate loophole."
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