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Bell Correlations at finite temperature

Fadel, Matteo and Tura, Jordi. (2018) Bell Correlations at finite temperature. Quantum, 2. p. 107.

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Official URL: https://edoc.unibas.ch/68796/

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Abstract

We show that spin systems with infinite-range interactions can violate at thermal equilibrium a multipartite Bell inequality, up to a finite critical temperature Tc. Our framework can be applied to a wide class of spin systems and Bell inequalities, to study whether nonlocality occurs naturally in quantum many-body systems close to the ground state. Moreover, we also show that the low-energy spectrum of the Bell operator associated to such systems can be well approximated by the one of a quantum harmonic oscillator, and that spin-squeezed states are optimal in displaying Bell correlations for such Bell inequalities.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentelle Nanophysik (Treutlein)
UniBasel Contributors:Fadel, Matteo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
e-ISSN:2521-327X
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:16 Oct 2019 13:36
Deposited On:11 Oct 2019 11:52

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