Bipartite nonlocality with a many-body system

Oudot, Enky and Bancal, Jean-Daniel and Sekatski, Pavel and Sangouard, Nicolas. (2019) Bipartite nonlocality with a many-body system. New Journal of Physics, 21 (10). p. 103043.

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Official URL: https://edoc.unibas.ch/73877/

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We consider a bipartite scenario where two parties hold ensembles of 1/2-spins which can only be measured collectively. We give numerical arguments supporting the conjecture that in this scenario no Bell inequality can be violated for arbitrary numbers of spins if only first order moment observables are available. We then give a recipe to achieve a significant Bell violation with a split many-body system when this restriction is lifted. This highlights the strong requirements needed to detect bipartite quantum correlations in many-body systems device-independently.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Quantum Physics (Sangouard)
UniBasel Contributors:Sangouard, Nicolas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:15 Apr 2020 16:25
Deposited On:15 Apr 2020 16:25

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