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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4058
DTSTART:20160303T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T145320Z
LAST-MODIFIED:20160229T131426Z
LOCATION:5310 Chamberlin Hall
SUMMARY:To a loophole-free test of local realism and beyond.\, R. G. H
 erb Condensed Matter Seminar\, Brad Christensen\, University Illinois 
 Urbana-Champaign
DESCRIPTION:A loophole-free Bell test has been sought to conclusively 
 answer a central debate of 20th century physics: can an alternative th
 eory to quantum mechanics (i.e.\, a local realistic theory) explain en
 tanglement's seemingly nonclassical correlations?  Here\, we will pres
 ent the details of our loophole-free Bell test\, where we use a high-q
 uality and high-efficiency source of entangled photons to achieve a p-
 value as low as 5.8 x 10-9 while maintaining space-like separation of 
 all relevant events.  Furthermore\, we will briefly discuss the genera
 lized theory of nonlocality\, which we use to experimentally demonstra
 te the counterintuitive effect of more nonlocality with less entanglem
 ent\, present the most nonlocal correlations ever reported and use the
 se correlations to bound the predictability of any post-quantum theory
 \, and achieve quantum correlations requiring the use of complex qubit
 s.  From this small sample of measurements\, we hope to show the stren
 gth of Bell tests in probing current and future theories.
URL:https://www.physics.wisc.edu/events/?id=4058
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