Universität zu Köln

Ringbauer, Martin ORCID: 0000-0001-5055-6240, Giarmatzi, Christina ORCID: 0000-0001-8254-2169, Chaves, Rafael ORCID: 0000-0001-8493-4019, Costa, Fabio ORCID: 0000-0002-6547-6005, White, Andrew G. ORCID: 0000-0001-9639-5200 and Fedrizzi, Alessandro ORCID: 0000-0002-5089-3148 (2016). Experimental test of nonlocal causality. Sci. Adv., 2 (8). WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 2375-2548

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Abstract

Explaining observations in terms of causes and effects is central to empirical science. However, correlations between entangled quantum particles seem to defy such an explanation. This implies that some of the fundamental assumptions of causal explanations have to give way. We consider a relaxation of one of these assumptions, Bell's local causality, by allowing outcome dependence: a direct causal influence between the outcomes of measurements of remote parties. We use interventional data from a photonic experiment to bound the strength of this causal influence in a two-party Bell scenario, and observational data from a Bell-type inequality test for the considered models. Our results demonstrate the incompatibility of quantum mechanics with a broad class of nonlocal causal models, which includes Bell-local models as a special case. Recovering a classical causal picture of quantum correlations thus requires an even more radical modification of our classical notion of cause and effect.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ringbauer, Martin UNSPECIFIED orcid.org/0000-0001-5055-6240 UNSPECIFIED Giarmatzi, Christina UNSPECIFIED orcid.org/0000-0001-8254-2169 UNSPECIFIED Chaves, Rafael UNSPECIFIED orcid.org/0000-0001-8493-4019 UNSPECIFIED Costa, Fabio UNSPECIFIED orcid.org/0000-0002-6547-6005 UNSPECIFIED White, Andrew G. UNSPECIFIED orcid.org/0000-0001-9639-5200 UNSPECIFIED Fedrizzi, Alessandro UNSPECIFIED orcid.org/0000-0002-5089-3148 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-267653
DOI:	10.1126/sciadv.1600162
Journal or Publication Title:	Sci. Adv.
Volume:	2
Number:	8
Date:	2016
Publisher:	AMER ASSOC ADVANCEMENT SCIENCE
Place of Publication:	WASHINGTON
ISSN:	2375-2548
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language QUANTUM CORRELATIONS Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26765