Inflation in non-local hybrid metric-Palatini gravity

26 pages, 4 figures

Detalles Bibliográficos
Autores: Bombacigno, F., De Angelis, Mariaveronica, van de Bruck, Carsten, Giarè, William
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::81e207011c21a672e2631e963c4551ed
Acceso en línea:http://hdl.handle.net/10261/430574
http://arxiv.org/abs/2412.15064v2
Access Level:acceso abierto
Palabra clave:Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories
Inflation
Modified gravity
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spelling Inflation in non-local hybrid metric-Palatini gravityBombacigno, F.De Angelis, Mariaveronicavan de Bruck, CarstenGiarè, WilliamGauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theoriesInflationModified gravity26 pages, 4 figuresWithin the framework of hybrid metric-Palatini gravity, we incorporate non-localities introduced via the inverse of the d'Alembert operators acting on the scalar curvature. We analyse the dynamical structure of the theory and, adopting a scalar-tensor perspective, assess the stability conditions to ensure the absence of ghost instabilities. Focusing on a special class of well-defined hybrid actions -- where local and non-local contributions are carried by distinct types of curvature -- we investigate the feasibility of inflation within the resulting Einstein-frame multi-field scenario. We examine how the non-minimal kinetic couplings between the fields, reflecting the non-local structure of the original frame, influence the number of e-folds and the field trajectories. To clarify the physical interpretation of our results, we draw analogies with benchmark single-field inflation scenarios that include spectator fields.The work of FB has been supported by grants PID2020-116567GB-C21, PID2023-149560NBC21 funded by MCIU/AEI/10.13039/501100011033 and FEDER, UE. MDA is supported by an EPSRC studentship. WG and CvdB are supported by the Lancaster-Sheffield Consortium for Fundamental Physics under STFC grant: ST/X000621/1.Peer reviewedIOP PublishingMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Lancaster-Sheffield ConsortiumEuropean CommissionBombacigno, F. [0000-0003-2869-0907]De Angelis, Mariaveronica [0000-0003-3432-8250]van de Bruck, Carsten [0000-0001-8311-8941]Giarè, William [0000-0002-4012-9285]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/430574http://arxiv.org/abs/2412.15064v2reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116567GB-C21info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-149560NB-C21Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::81e207011c21a672e2631e963c4551ed2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Inflation in non-local hybrid metric-Palatini gravity
title Inflation in non-local hybrid metric-Palatini gravity
spellingShingle Inflation in non-local hybrid metric-Palatini gravity
Bombacigno, F.
Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories
Inflation
Modified gravity
title_short Inflation in non-local hybrid metric-Palatini gravity
title_full Inflation in non-local hybrid metric-Palatini gravity
title_fullStr Inflation in non-local hybrid metric-Palatini gravity
title_full_unstemmed Inflation in non-local hybrid metric-Palatini gravity
title_sort Inflation in non-local hybrid metric-Palatini gravity
dc.creator.none.fl_str_mv Bombacigno, F.
De Angelis, Mariaveronica
van de Bruck, Carsten
Giarè, William
author Bombacigno, F.
author_facet Bombacigno, F.
De Angelis, Mariaveronica
van de Bruck, Carsten
Giarè, William
author_role author
author2 De Angelis, Mariaveronica
van de Bruck, Carsten
Giarè, William
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Lancaster-Sheffield Consortium
European Commission
Bombacigno, F. [0000-0003-2869-0907]
De Angelis, Mariaveronica [0000-0003-3432-8250]
van de Bruck, Carsten [0000-0001-8311-8941]
Giarè, William [0000-0002-4012-9285]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories
Inflation
Modified gravity
topic Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories
Inflation
Modified gravity
description 26 pages, 4 figures
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/430574
http://arxiv.org/abs/2412.15064v2
url http://hdl.handle.net/10261/430574
http://arxiv.org/abs/2412.15064v2
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116567GB-C21
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-149560NB-C21
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP 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
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