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A Significant-Loophole-Free Test of Bells Theorem with Entangled Photons
Austrian Academic Science, Austria; University of Vienna, Austria.
Austrian Academic Science, Austria; University of Vienna, Austria.
Austrian Academic Science, Austria; University of Vienna, Austria.
Austrian Academic Science, Austria; University of Vienna, Austria.
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2017 (English)In: QUANTUM INFORMATION SCIENCE AND TECHNOLOGY III, SPIE-INT SOC OPTICAL ENGINEERING , 2017, Vol. 10442, article id UNSP 1044204Conference paper, Published paper (Refereed)
Abstract [en]

John Bells theorem of 1964 states that local elements of physical reality, existing independent of measurement, are inconsistent with the predictions of quantum mechanics (Bell, J. S. (1964), Physics (College. Park. Md). 1 (3), 195). Specifically, correlations between measurement results from distant entangled systems would be smaller than predicted by quantum physics. This is expressed in Bells inequalities. Employing modifications of Bells inequalities, many experiments have been performed that convincingly support the quantum predictions. Yet, all experiments rely on assumptions, which provide loopholes for a local realist explanation of the measurement. Here we report an experiment with polarization-entangled photons that simultaneously closes the most significant of these loopholes. We use a highly efficient source of entangled photons, distributed these over a distance of 58.5 meters, and implemented rapid random setting generation and high-efficiency detection to observe a violation of a Bell inequality with high statistical significance. The merely statistical probability of our results to occur under local realism is less than 3.74 . 10(-31), corresponding to an 11.5 standard deviation effect.

Place, publisher, year, edition, pages
SPIE-INT SOC OPTICAL ENGINEERING , 2017. Vol. 10442, article id UNSP 1044204
Series
Proceedings of SPIE, ISSN 0277-786X
Keywords [en]
Bell test; entangled photon source; polarization entanglement; signifcant-loophole-free test; local realism; Bell inequality; polarization measurements
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Identifiers
URN: urn:nbn:se:liu:diva-144167DOI: 10.1117/12.2277696ISI: 000418448600002ISBN: 978-1-5106-1349-2 ISBN: 978-1-5106-1348-5 OAI: oai:DiVA.org:liu-144167DiVA, id: diva2:1171632
Conference
Conference on Quantum Information Science and Technology III
Note

Funding Agencies|program CoQuS of the FWF (Austrian Science Fund); EU Integrated Project SIQS; European Research Council Project AQUMET; European Union Project QUIC [641122]; Spanish MINECO under Severo Ochoa programme [SEV-2015-0522]; Project MAGO [FIS2011-23520]; Project XPLICA [FIS2014-62181-EXP]; Catalan AGAUR SGR [1295, 1623]; European Regional Development Fund (FEDER) [TEC2013-46168-R]; Fundacio Privada CELLEX; NIST Quantum Information Science Initiative; Austrian Academy of Sciences (OAW); European Research Council (SIQS Grant) [600645 EU-FP7-ICT]; Austrian Science Fund (FWF) [SFB F40]

Available from: 2018-01-08 Created: 2018-01-08 Last updated: 2018-01-08

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