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Article overview
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The statistical strength of experiments to reject local realism with photon pairs and inefficient detectors | Yanbao Zhang
; Emanuel Knill
; Scott Glancy
; | Date: |
11 Jan 2010 | Abstract: | Because of the fundamental importance of Bell’s theorem, a loophole-free
demonstration of a violation of local realism (LR) is highly desirable. Here,
we study violations of LR involving photon pairs. We quantify the experimental
evidence against LR by using measures of statistical strength related to the
Kullback-Leibler (KL) divergence, as suggested by W. van Dam, P. Grunwald and
R. Gill [IEEE Trans. Inf. Theory. 51, 2812 (2005)]. Specifically, we analyze a
test of LR with entangled states created from two independent polarized photons
passing through a polarizing beam splitter. We numerically study the detection
efficiency required to achieve a specified statistical strength for the
rejection of LR depending on whether photon counters or detectors are used.
Based on our results, we find that a test of LR free of the detection loophole
requires photon counters with efficiency at least 89.71%, or photon detectors
with efficiency at least 91.11%. For comparison, we also perform this analysis
with ideal unbalanced Bell states, which are known to allow rejection of LR
with detector efficiencies above 2/3. | Source: | arXiv, 1001.1750 | Services: | Forum | Review | PDF | Favorites |
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