Phase dependence of localization in the driven two-level model

A two-level system subjected to a high-frequency driving field can exhibit an effect termed "coherent destruction of tunneling", in which the tunneling of the system is suppressed at certain values of the frequency and strength of the field. This suppression becomes less effective as the f...

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Detalles Bibliográficos
Autor: Creffield, Charles
Tipo de recurso: artículo
Fecha de publicación:2004
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51862
Acceso en línea:https://hdl.handle.net/20.500.14352/51862
Access Level:acceso abierto
Palabra clave:538.9
Physics
Quantum states
Física de materiales
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spelling Phase dependence of localization in the driven two-level modelCreffield, Charles538.9PhysicsQuantum statesFísica de materialesA two-level system subjected to a high-frequency driving field can exhibit an effect termed "coherent destruction of tunneling", in which the tunneling of the system is suppressed at certain values of the frequency and strength of the field. This suppression becomes less effective as the frequency of the driving field is reduced, and we show here how the detailed form of its fall-off depends on the phase of the driving, which for certain values can produce small local maxima (or revivals) in the overall decay. By considering a square-wave driving field, which has the advantage of being analytically tractable, we show how this surprising behavior can be interpreted geometrically in terms of orbits on the Bloch sphere. These results are of general applicability to more commonly used fields, such as sinusoidal driving, which display a similar phenomenology.European Physical SocietyUniversidad Complutense de Madrid20042004-06-0120042004-06-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/51862reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/518622026-06-02T12:44:21Z
dc.title.none.fl_str_mv Phase dependence of localization in the driven two-level model
title Phase dependence of localization in the driven two-level model
spellingShingle Phase dependence of localization in the driven two-level model
Creffield, Charles
538.9
Physics
Quantum states
Física de materiales
title_short Phase dependence of localization in the driven two-level model
title_full Phase dependence of localization in the driven two-level model
title_fullStr Phase dependence of localization in the driven two-level model
title_full_unstemmed Phase dependence of localization in the driven two-level model
title_sort Phase dependence of localization in the driven two-level model
dc.creator.none.fl_str_mv Creffield, Charles
author Creffield, Charles
author_facet Creffield, Charles
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Physics
Quantum states
Física de materiales
topic 538.9
Physics
Quantum states
Física de materiales
description A two-level system subjected to a high-frequency driving field can exhibit an effect termed "coherent destruction of tunneling", in which the tunneling of the system is suppressed at certain values of the frequency and strength of the field. This suppression becomes less effective as the frequency of the driving field is reduced, and we show here how the detailed form of its fall-off depends on the phase of the driving, which for certain values can produce small local maxima (or revivals) in the overall decay. By considering a square-wave driving field, which has the advantage of being analytically tractable, we show how this surprising behavior can be interpreted geometrically in terms of orbits on the Bloch sphere. These results are of general applicability to more commonly used fields, such as sinusoidal driving, which display a similar phenomenology.
publishDate 2004
dc.date.none.fl_str_mv 2004
2004-06-01
2004
2004-06-01
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/20.500.14352/51862
url https://hdl.handle.net/20.500.14352/51862
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 European Physical Society
publisher.none.fl_str_mv European 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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