Topological Heat Transport and Symmetry-Protected Boson Currents

Abstract The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic Hofstadter lattice coupled to two thermal baths in the quantum open-system formalism. Novel phenomena appear lik...

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Autores principales:	Ángel Rivas, Miguel A. Martin-Delgado
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7f175fb6c41e4ea9998f3840b21264df
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spelling	oai:doaj.org-article:7f175fb6c41e4ea9998f3840b21264df2021-12-02T12:32:19ZTopological Heat Transport and Symmetry-Protected Boson Currents10.1038/s41598-017-06722-x2045-2322https://doaj.org/article/7f175fb6c41e4ea9998f3840b21264df2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06722-xhttps://doaj.org/toc/2045-2322Abstract The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic Hofstadter lattice coupled to two thermal baths in the quantum open-system formalism. Novel phenomena appear like chiral edge heat currents that are the out-of-equilibrium counterparts of the zero-temperature edge currents. They support a new concept of dissipative symmetry-protection, where a set of discrete symmetries protects topological heat currents, differing from the symmetry-protection devised in closed systems and zero-temperature. Remarkably, one of these currents flows opposite to the decreasing external temperature gradient. As the starting point, we consider the case of a single external reservoir already showing prominent results like thermal erasure effects and topological thermal currents. Our results are experimentally accessible with platforms like photonics systems and optical lattices.Ángel RivasMiguel A. Martin-DelgadoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ángel Rivas Miguel A. Martin-Delgado Topological Heat Transport and Symmetry-Protected Boson Currents
description	Abstract The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic Hofstadter lattice coupled to two thermal baths in the quantum open-system formalism. Novel phenomena appear like chiral edge heat currents that are the out-of-equilibrium counterparts of the zero-temperature edge currents. They support a new concept of dissipative symmetry-protection, where a set of discrete symmetries protects topological heat currents, differing from the symmetry-protection devised in closed systems and zero-temperature. Remarkably, one of these currents flows opposite to the decreasing external temperature gradient. As the starting point, we consider the case of a single external reservoir already showing prominent results like thermal erasure effects and topological thermal currents. Our results are experimentally accessible with platforms like photonics systems and optical lattices.
format	article
author	Ángel Rivas Miguel A. Martin-Delgado
author_facet	Ángel Rivas Miguel A. Martin-Delgado
author_sort	Ángel Rivas
title	Topological Heat Transport and Symmetry-Protected Boson Currents
title_short	Topological Heat Transport and Symmetry-Protected Boson Currents
title_full	Topological Heat Transport and Symmetry-Protected Boson Currents
title_fullStr	Topological Heat Transport and Symmetry-Protected Boson Currents
title_full_unstemmed	Topological Heat Transport and Symmetry-Protected Boson Currents
title_sort	topological heat transport and symmetry-protected boson currents
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7f175fb6c41e4ea9998f3840b21264df
work_keys_str_mv	AT angelrivas topologicalheattransportandsymmetryprotectedbosoncurrents AT miguelamartindelgado topologicalheattransportandsymmetryprotectedbosoncurrents
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Topological Heat Transport and Symmetry-Protected Boson Currents

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