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Opacity from Loops in AdS

Detalhes bibliográficos
Autor(a) principal: Costantino, Alexandria
Data de Publicação: 2021
Outros Autores: Fichet, Sylvain [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/JHEP02(2021)089
http://hdl.handle.net/11449/207624
Resumo: We investigate how quantum dynamics affects the propagation of a scalar field in Lorentzian AdS. We work in momentum space, in which the propagator admits two spectral representations (denoted “conformal” and “momentum”) in addition to a closed-form one, and all have a simple split structure. Focusing on scalar bubbles, we compute the imaginary part of the self-energy ImΠ in the three representations, which involves the evaluation of seemingly very different objects. We explicitly prove their equivalence in any dimension, and derive some elementary and asymptotic properties of ImΠ. Using a WKB-like approach in the timelike region, we evaluate the propagator dressed with the imaginary part of the self-energy. We find that the dressing from loops exponentially dampens the propagator when one of the endpoints is in the IR region, rendering this region opaque to propagation. This suppression may have implications for field-theoretical model-building in AdS. We argue that in the effective theory (EFT) paradigm, opacity of the IR region induced by higher dimensional operators censors the region of EFT breakdown. This confirms earlier expectations from the literature. Specializing to AdS5, we determine a universal contribution to opacity from gravity.
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spelling Opacity from Loops in AdSAdS-CFT CorrespondenceEffective Field TheoriesField Theories in Higher DimensionsWe investigate how quantum dynamics affects the propagation of a scalar field in Lorentzian AdS. We work in momentum space, in which the propagator admits two spectral representations (denoted “conformal” and “momentum”) in addition to a closed-form one, and all have a simple split structure. Focusing on scalar bubbles, we compute the imaginary part of the self-energy ImΠ in the three representations, which involves the evaluation of seemingly very different objects. We explicitly prove their equivalence in any dimension, and derive some elementary and asymptotic properties of ImΠ. Using a WKB-like approach in the timelike region, we evaluate the propagator dressed with the imaginary part of the self-energy. We find that the dressing from loops exponentially dampens the propagator when one of the endpoints is in the IR region, rendering this region opaque to propagation. This suppression may have implications for field-theoretical model-building in AdS. We argue that in the effective theory (EFT) paradigm, opacity of the IR region induced by higher dimensional operators censors the region of EFT breakdown. This confirms earlier expectations from the literature. Specializing to AdS5, we determine a universal contribution to opacity from gravity.Department of Physics and Astronomy University of CaliforniaICTP South American Institute for Fundamental Research and IFT-UNESP, R. Dr. Bento Teobaldo FerrazICTP South American Institute for Fundamental Research and IFT-UNESP, R. Dr. Bento Teobaldo FerrazUniversity of CaliforniaUniversidade Estadual Paulista (Unesp)Costantino, AlexandriaFichet, Sylvain [UNESP]2021-06-25T10:58:15Z2021-06-25T10:58:15Z2021-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/JHEP02(2021)089Journal of High Energy Physics, v. 2021, n. 2, 2021.1029-8479http://hdl.handle.net/11449/20762410.1007/JHEP02(2021)0892-s2.0-85104450764Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of High Energy Physicsinfo:eu-repo/semantics/openAccess2021-10-23T17:45:47Zoai:repositorio.unesp.br:11449/207624Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:21:31.978786Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Opacity from Loops in AdS
title Opacity from Loops in AdS
spellingShingle Opacity from Loops in AdS
Costantino, Alexandria
AdS-CFT Correspondence
Effective Field Theories
Field Theories in Higher Dimensions
title_short Opacity from Loops in AdS
title_full Opacity from Loops in AdS
title_fullStr Opacity from Loops in AdS
title_full_unstemmed Opacity from Loops in AdS
title_sort Opacity from Loops in AdS
author Costantino, Alexandria
author_facet Costantino, Alexandria
Fichet, Sylvain [UNESP]
author_role author
author2 Fichet, Sylvain [UNESP]
author2_role author
dc.contributor.none.fl_str_mv University of California
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Costantino, Alexandria
Fichet, Sylvain [UNESP]
dc.subject.por.fl_str_mv AdS-CFT Correspondence
Effective Field Theories
Field Theories in Higher Dimensions
topic AdS-CFT Correspondence
Effective Field Theories
Field Theories in Higher Dimensions
description We investigate how quantum dynamics affects the propagation of a scalar field in Lorentzian AdS. We work in momentum space, in which the propagator admits two spectral representations (denoted “conformal” and “momentum”) in addition to a closed-form one, and all have a simple split structure. Focusing on scalar bubbles, we compute the imaginary part of the self-energy ImΠ in the three representations, which involves the evaluation of seemingly very different objects. We explicitly prove their equivalence in any dimension, and derive some elementary and asymptotic properties of ImΠ. Using a WKB-like approach in the timelike region, we evaluate the propagator dressed with the imaginary part of the self-energy. We find that the dressing from loops exponentially dampens the propagator when one of the endpoints is in the IR region, rendering this region opaque to propagation. This suppression may have implications for field-theoretical model-building in AdS. We argue that in the effective theory (EFT) paradigm, opacity of the IR region induced by higher dimensional operators censors the region of EFT breakdown. This confirms earlier expectations from the literature. Specializing to AdS5, we determine a universal contribution to opacity from gravity.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T10:58:15Z
2021-06-25T10:58:15Z
2021-02-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1007/JHEP02(2021)089
Journal of High Energy Physics, v. 2021, n. 2, 2021.
1029-8479
http://hdl.handle.net/11449/207624
10.1007/JHEP02(2021)089
2-s2.0-85104450764
url http://dx.doi.org/10.1007/JHEP02(2021)089
http://hdl.handle.net/11449/207624
identifier_str_mv Journal of High Energy Physics, v. 2021, n. 2, 2021.
1029-8479
10.1007/JHEP02(2021)089
2-s2.0-85104450764
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of High Energy Physics
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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