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Bell correlations in a Bose-Einstein condensate
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 3705921
Author(s) Schmied, Roman; Bancal, Jean-Daniel; Allard, Baptiste; Fadel, Matteo; Scarani, Valerio; Treutlein, Philipp; Sangouard, Nicolas
Author(s) at UniBasel Treutlein, Philipp
Schmied, Roman
Bancal, Jean-Daniel
Allard, Baptiste
Fadel, Matteo
Sangouard, Nicolas
Year 2016
Title Bell correlations in a Bose-Einstein condensate
Journal Science
Volume 352
Number 6284
Pages / Article-Number 441-4
Abstract Characterizing many-body systems through the quantum correlations between their constituent particles is a major goal of quantum physics. Although entanglement is routinely observed in many systems, we report here the detection of stronger correlations—Bell correlations—between the spins of about 480 atoms in a Bose-Einstein condensate. We derive a Bell correlation witness from a many-particle Bell inequality involving only one- and two-body correlation functions. Our measurement on a spin-squeezed state exceeds the threshold for Bell correlations by 3.8 standard deviations. Our work shows that the strongest possible nonclassical correlations are experimentally accessible in many-body systems and that they can be revealed by collective measurements.
Publisher American Association for the Advancement of Science
ISSN/ISBN 0036-8075 ; 1095-9203
URL https://arxiv.org/pdf/1604.06419.pdf
edoc-URL http://edoc.unibas.ch/52751/
Full Text on edoc No
Digital Object Identifier DOI 10.1126/science.aad8665
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/27102479
ISI-Number WOS:000374479700042
Document type (ISI) Journal Article
 
   

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28/03/2024