Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures

Abstract Quantum correlations, in particular those, which enable to violate a Bell inequality, open a way to advantage in certain communication tasks. However, the main difficulty in harnessing quantumness is its fragility to, e.g, noise or loss of particles. We study the persistency of Bell correla...

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Autor principal:	Marcin Wieśniak
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe1c64c84fe64b7fb1ccae4e4f88c29d
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spelling	oai:doaj.org-article:fe1c64c84fe64b7fb1ccae4e4f88c29d2021-12-02T16:14:04ZSymmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures10.1038/s41598-021-93786-52045-2322https://doaj.org/article/fe1c64c84fe64b7fb1ccae4e4f88c29d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93786-5https://doaj.org/toc/2045-2322Abstract Quantum correlations, in particular those, which enable to violate a Bell inequality, open a way to advantage in certain communication tasks. However, the main difficulty in harnessing quantumness is its fragility to, e.g, noise or loss of particles. We study the persistency of Bell correlations of GHZ based mixtures and Dicke states. For the former, we consider quantum communication complexity reduction (QCCR) scheme, and propose new Bell inequalities (BIs), which can be used in that scheme for higher persistency in the limit of large number of particles N. In case of Dicke states, we show that persistency can reach 0.482N, significantly more than reported in previous studies.Marcin WieśniakNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marcin Wieśniak Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
description	Abstract Quantum correlations, in particular those, which enable to violate a Bell inequality, open a way to advantage in certain communication tasks. However, the main difficulty in harnessing quantumness is its fragility to, e.g, noise or loss of particles. We study the persistency of Bell correlations of GHZ based mixtures and Dicke states. For the former, we consider quantum communication complexity reduction (QCCR) scheme, and propose new Bell inequalities (BIs), which can be used in that scheme for higher persistency in the limit of large number of particles N. In case of Dicke states, we show that persistency can reach 0.482N, significantly more than reported in previous studies.
format	article
author	Marcin Wieśniak
author_facet	Marcin Wieśniak
author_sort	Marcin Wieśniak
title	Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
title_short	Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
title_full	Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
title_fullStr	Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
title_full_unstemmed	Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures
title_sort	symmetrized persistency of bell correlations for dicke states and ghz-based mixtures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fe1c64c84fe64b7fb1ccae4e4f88c29d
work_keys_str_mv	AT marcinwiesniak symmetrizedpersistencyofbellcorrelationsfordickestatesandghzbasedmixtures
_version_	1718384389448007680

Symmetrized persistency of Bell correlations for Dicke states and GHZ-based mixtures

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