The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization

35 pags., 5 figs.

Detalles Bibliográficos
Autores: García-Quismondo, Alejandro, Mena Marugán, Guillermo A., Sánchez-Pérez, G.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/226621
Acceso en línea:http://hdl.handle.net/10261/226621
Access Level:acceso abierto
Palabra clave:Loop quantum cosmology
Cosmological perturbations
Effective time-dependent masses
Quantum field theory in curved spacetimes
Big bounce
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spelling The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularizationGarcía-Quismondo, AlejandroMena Marugán, Guillermo A.Sánchez-Pérez, G.Loop quantum cosmologyCosmological perturbationsEffective time-dependent massesQuantum field theory in curved spacetimesBig bounce35 pags., 5 figs.In this work, we compute the time-dependent masses that govern the dynamics of scalar and tensor perturbations propagating on an effective flat, homogeneous, and isotropic background within the framework of loop quantum cosmology (LQC), regularized according to the procedure put forward by Dapor and Liegener. To do so, we follow the two main approaches that, in the field of LQC, lead to hyperbolic equations for the perturbations in the ultraviolet sector: the hybrid and dressed metric formalisms. This allows us to compare the masses resulting from both proposals and analyze their positivity in regimes of physical interest: the big bounce and the contracting de Sitter phase in the asymptotic past that is a defining feature of the model under consideration.This work has been supported by Project No. FIS2017-86497-C2-2-P of MICINN from Spain. A GarciaQuismondo acknowledges that the project that gave rise to these results received the support of a fellowship from ‘la Caixa’ Foundation (ID 100010434). The fellowship code is LCF/BQ/DR19/11740028. G Sanchez Perez acknowledges support of the Grant No. CSIC JAEINT19_EX_0632.Institute of Physics PublishingMinisterio de Economía y Competitividad (España)Fundación Caixa GaliciaConsejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120202021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/226621reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2017-86497-C2-2-Phttp://dx.doi.org/10.1088/1361-6382/abac6dSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2266212026-05-22T06:33:51Z
dc.title.none.fl_str_mv The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
title The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
spellingShingle The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
García-Quismondo, Alejandro
Loop quantum cosmology
Cosmological perturbations
Effective time-dependent masses
Quantum field theory in curved spacetimes
Big bounce
title_short The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
title_full The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
title_fullStr The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
title_full_unstemmed The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
title_sort The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
dc.creator.none.fl_str_mv García-Quismondo, Alejandro
Mena Marugán, Guillermo A.
Sánchez-Pérez, G.
author García-Quismondo, Alejandro
author_facet García-Quismondo, Alejandro
Mena Marugán, Guillermo A.
Sánchez-Pérez, G.
author_role author
author2 Mena Marugán, Guillermo A.
Sánchez-Pérez, G.
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Fundación Caixa Galicia
Consejo Superior de Investigaciones Científicas (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Loop quantum cosmology
Cosmological perturbations
Effective time-dependent masses
Quantum field theory in curved spacetimes
Big bounce
topic Loop quantum cosmology
Cosmological perturbations
Effective time-dependent masses
Quantum field theory in curved spacetimes
Big bounce
description 35 pags., 5 figs.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/226621
url http://hdl.handle.net/10261/226621
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2017-86497-C2-2-P
http://dx.doi.org/10.1088/1361-6382/abac6d
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institute of Physics Publishing
publisher.none.fl_str_mv Institute of Physics Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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