Violation of local realism with freedom of choice

Scheidl, T; Ursin, R; Kofler, J; Ramelow, S; Ma, XS; Herbst, T; Ratschbacher, L; Fedrizzi, A; Langford, NK; Jennewein, T; Zeilinger, A

Violation of local realism with freedom of choice

Scheidl, T Ursin, R Kofler, J Ramelow, S Ma, XS Herbst, T Ratschbacher, L Fedrizzi, A Langford, NK

Jennewein, T Zeilinger, A

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Publication Type:: Journal Article
Citation:: Proceedings of the National Academy of Sciences of the United States of America, 2010, 107 (46), pp. 19708 - 19713
Issue Date:: 2010-11-16

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Field	Value	Language
dc.contributor.author	Scheidl, T	en_US
dc.contributor.author	Ursin, R	en_US
dc.contributor.author	Kofler, J	en_US
dc.contributor.author	Ramelow, S	en_US
dc.contributor.author	Ma, XS	en_US
dc.contributor.author	Herbst, T	en_US
dc.contributor.author	Ratschbacher, L	en_US
dc.contributor.author	Fedrizzi, A	en_US
dc.contributor.author	Langford, NK https://orcid.org/0000-0003-4338-3059	en_US
dc.contributor.author	Jennewein, T	en_US
dc.contributor.author	Zeilinger, A	en_US
dc.date.issued	2010-11-16	en_US
dc.identifier.citation	Proceedings of the National Academy of Sciences of the United States of America, 2010, 107 (46), pp. 19708 - 19713	en_US
dc.identifier.issn	0027-8424	en_US
dc.identifier.uri	http://hdl.handle.net/10453/136716
dc.description.abstract	Bell's theorem shows that local realistic theories place strong restrictions on observable correlations between different systems, giving rise to Bell's inequality which can be violated in experiments using entangled quantum states. Bell's theorem is based on the assumptions of realism, locality, and the freedom to choose betweenmeasurement settings. In experimental tests, "loopholes" arise which allow observed violations to still be explained by local realistic theories. Violating Bell's inequality while simultaneously closing all such loopholes is one of the most significant still open challenges in fundamental physics today. In this paper, we present an experiment that violates Bell's inequality while simultaneously closing the locality loophole and addressing the freedom-of-choice loophole, also closing the latter within a reasonable set of assumptions.We also explain that the locality and freedom-of-choice loopholes can be closed onlywithin nondeterminism, i.e., in the context of stochastic local realism.	en_US
dc.relation.ispartof	Proceedings of the National Academy of Sciences of the United States of America	en_US
dc.relation.isbasedon	10.1073/pnas.1002780107	en_US
dc.title	Violation of local realism with freedom of choice	en_US
dc.type	Journal Article
utslib.citation.volume	46	en_US
utslib.citation.volume	107	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - QSI - Centre for Quantum Software and Information
utslib.copyright.status	open_access
pubs.issue	46	en_US
pubs.publication-status	Published	en_US
pubs.volume	107	en_US

Abstract:

Bell's theorem shows that local realistic theories place strong restrictions on observable correlations between different systems, giving rise to Bell's inequality which can be violated in experiments using entangled quantum states. Bell's theorem is based on the assumptions of realism, locality, and the freedom to choose betweenmeasurement settings. In experimental tests, "loopholes" arise which allow observed violations to still be explained by local realistic theories. Violating Bell's inequality while simultaneously closing all such loopholes is one of the most significant still open challenges in fundamental physics today. In this paper, we present an experiment that violates Bell's inequality while simultaneously closing the locality loophole and addressing the freedom-of-choice loophole, also closing the latter within a reasonable set of assumptions.We also explain that the locality and freedom-of-choice loopholes can be closed onlywithin nondeterminism, i.e., in the context of stochastic local realism.

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http://hdl.handle.net/10453/136716