Thermal instability of protected end states in a one-dimensional topological insulator

We have studied the dynamical thermal effects on the protected end states of a topological insulator (TI) when it is considered as an open quantum system in interaction with a noisy environment at a certain temperature T . As a result, we find that protected end states in a TI become unstable and de...

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Detalles Bibliográficos
Autores: Viyuela García, Óscar, Rivas Vargas, Ángel, Martín-Delgado Alcántara, Miguel Ángel
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/42808
Acceso en línea:https://hdl.handle.net/20.500.14352/42808
Access Level:acceso abierto
Palabra clave:53
Superconductors
Física-Modelos matemáticos
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spelling Thermal instability of protected end states in a one-dimensional topological insulatorViyuela García, ÓscarRivas Vargas, ÁngelMartín-Delgado Alcántara, Miguel Ángel53SuperconductorsFísica-Modelos matemáticosWe have studied the dynamical thermal effects on the protected end states of a topological insulator (TI) when it is considered as an open quantum system in interaction with a noisy environment at a certain temperature T . As a result, we find that protected end states in a TI become unstable and decay with time. Very remarkably, the interaction with the thermal environment (fermion-boson) respects chiral symmetry, which is the symmetry responsible for the protection (robustness) of the end states in this TI when it is isolated from the environment. Therefore, this mechanism makes end states unstable while preserving their protecting symmetry. Our results have immediate practical implications in recently proposed simulations of TIs using cold atoms in optical lattices. Accordingly, we have computed lifetimes of topological end states for these physical implementations that are useful to make those experiments realistic.American Physical SocietyUniversidad Complutense de Madrid20122012-10-2320122012-10-23journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/42808reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/428082026-06-02T12:44:21Z
dc.title.none.fl_str_mv Thermal instability of protected end states in a one-dimensional topological insulator
title Thermal instability of protected end states in a one-dimensional topological insulator
spellingShingle Thermal instability of protected end states in a one-dimensional topological insulator
Viyuela García, Óscar
53
Superconductors
Física-Modelos matemáticos
title_short Thermal instability of protected end states in a one-dimensional topological insulator
title_full Thermal instability of protected end states in a one-dimensional topological insulator
title_fullStr Thermal instability of protected end states in a one-dimensional topological insulator
title_full_unstemmed Thermal instability of protected end states in a one-dimensional topological insulator
title_sort Thermal instability of protected end states in a one-dimensional topological insulator
dc.creator.none.fl_str_mv Viyuela García, Óscar
Rivas Vargas, Ángel
Martín-Delgado Alcántara, Miguel Ángel
author Viyuela García, Óscar
author_facet Viyuela García, Óscar
Rivas Vargas, Ángel
Martín-Delgado Alcántara, Miguel Ángel
author_role author
author2 Rivas Vargas, Ángel
Martín-Delgado Alcántara, Miguel Ángel
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 53
Superconductors
Física-Modelos matemáticos
topic 53
Superconductors
Física-Modelos matemáticos
description We have studied the dynamical thermal effects on the protected end states of a topological insulator (TI) when it is considered as an open quantum system in interaction with a noisy environment at a certain temperature T . As a result, we find that protected end states in a TI become unstable and decay with time. Very remarkably, the interaction with the thermal environment (fermion-boson) respects chiral symmetry, which is the symmetry responsible for the protection (robustness) of the end states in this TI when it is isolated from the environment. Therefore, this mechanism makes end states unstable while preserving their protecting symmetry. Our results have immediate practical implications in recently proposed simulations of TIs using cold atoms in optical lattices. Accordingly, we have computed lifetimes of topological end states for these physical implementations that are useful to make those experiments realistic.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-10-23
2012
2012-10-23
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/42808
url https://hdl.handle.net/20.500.14352/42808
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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