Spontaneous symmetry breaking in persistent currents of spinor polaritons

Abstract We predict the spontaneous symmetry breaking in a spinor Bose–Einstein condensate of exciton-polaritons (polaritons) caused by the coupling of its spin and orbital degrees of freedom. We study a polariton condensate trapped in a ring-shaped effective potential with a broken rotational symme...

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Autores principales:	Evgeny Sedov, Sergey Arakelian, Alexey Kavokin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7e7e32695d354b9ba7d82ea1ca8d11dc
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spelling	oai:doaj.org-article:7e7e32695d354b9ba7d82ea1ca8d11dc2021-11-21T12:24:30ZSpontaneous symmetry breaking in persistent currents of spinor polaritons10.1038/s41598-021-01812-32045-2322https://doaj.org/article/7e7e32695d354b9ba7d82ea1ca8d11dc2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01812-3https://doaj.org/toc/2045-2322Abstract We predict the spontaneous symmetry breaking in a spinor Bose–Einstein condensate of exciton-polaritons (polaritons) caused by the coupling of its spin and orbital degrees of freedom. We study a polariton condensate trapped in a ring-shaped effective potential with a broken rotational symmetry. We propose a realistic scheme of generating controllable spinor azimuthal persistent currents of polaritons in the trap under the continuous wave optical pump. We propose a new type of half-quantum circulating states in a spinor system characterized by azimuthal currents in both circular polarizations and a vortex in only one of the polarizations. The spontaneous symmetry breaking in the spinor polariton condensate that consists in the switching from co-winding to opposite-winding currents in opposite spin states is revealed. It is characterized by the change of the average orbital angular momentum of the condensate from zero to non-zero values. The radial displacement of the pump spot and the polarization of the pump act as the control parameters. The considered system exhibits a fundamental similarity to a superconducting flux qubit, which makes it highly promising for applications in quantum computing.Evgeny SedovSergey ArakelianAlexey KavokinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Evgeny Sedov Sergey Arakelian Alexey Kavokin Spontaneous symmetry breaking in persistent currents of spinor polaritons
description	Abstract We predict the spontaneous symmetry breaking in a spinor Bose–Einstein condensate of exciton-polaritons (polaritons) caused by the coupling of its spin and orbital degrees of freedom. We study a polariton condensate trapped in a ring-shaped effective potential with a broken rotational symmetry. We propose a realistic scheme of generating controllable spinor azimuthal persistent currents of polaritons in the trap under the continuous wave optical pump. We propose a new type of half-quantum circulating states in a spinor system characterized by azimuthal currents in both circular polarizations and a vortex in only one of the polarizations. The spontaneous symmetry breaking in the spinor polariton condensate that consists in the switching from co-winding to opposite-winding currents in opposite spin states is revealed. It is characterized by the change of the average orbital angular momentum of the condensate from zero to non-zero values. The radial displacement of the pump spot and the polarization of the pump act as the control parameters. The considered system exhibits a fundamental similarity to a superconducting flux qubit, which makes it highly promising for applications in quantum computing.
format	article
author	Evgeny Sedov Sergey Arakelian Alexey Kavokin
author_facet	Evgeny Sedov Sergey Arakelian Alexey Kavokin
author_sort	Evgeny Sedov
title	Spontaneous symmetry breaking in persistent currents of spinor polaritons
title_short	Spontaneous symmetry breaking in persistent currents of spinor polaritons
title_full	Spontaneous symmetry breaking in persistent currents of spinor polaritons
title_fullStr	Spontaneous symmetry breaking in persistent currents of spinor polaritons
title_full_unstemmed	Spontaneous symmetry breaking in persistent currents of spinor polaritons
title_sort	spontaneous symmetry breaking in persistent currents of spinor polaritons
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7e7e32695d354b9ba7d82ea1ca8d11dc
work_keys_str_mv	AT evgenysedov spontaneoussymmetrybreakinginpersistentcurrentsofspinorpolaritons AT sergeyarakelian spontaneoussymmetrybreakinginpersistentcurrentsofspinorpolaritons AT alexeykavokin spontaneoussymmetrybreakinginpersistentcurrentsofspinorpolaritons
_version_	1718419015237369856

Spontaneous symmetry breaking in persistent currents of spinor polaritons

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