Cosmology from string T-duality and zero-point length

Inspired by string T-duality and taking into account the zero-point length correction, l0, to the gravitational potential, we construct modified Friedmann equations by applying the first law of thermodynamics on the apparent horizon of the Friedmann–Robertson–Walker (FRW) Universe. The cosmological...

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Detalles Bibliográficos
Autores: Luciano, Giuseppe Gaetano, Sheykhi, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/466199
Acceso en línea:https://doi.org/10.1140/epjc/s10052-024-13035-7
https://hdl.handle.net/10459.1/466199
Access Level:acceso abierto
Palabra clave:T-duality
Cosmology
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spelling Cosmology from string T-duality and zero-point lengthLuciano, Giuseppe GaetanoSheykhi, A.T-dualityCosmologyInspired by string T-duality and taking into account the zero-point length correction, l0, to the gravitational potential, we construct modified Friedmann equations by applying the first law of thermodynamics on the apparent horizon of the Friedmann–Robertson–Walker (FRW) Universe. The cosmological viability of this extended scenario is investigated by studying influences on the evolution of the early Universe and performing cosmographic analysis. Furthermore, we explore the inflationary paradigm under the slow-roll condition. By testing the model against observational data, the zero-point length is constrained around the Planck scale, in compliance with the original assumption from string T-duality. We also study the growth of density perturbations in the linear regime. It is shown that the zeropoint length stands out as an alternative characterization for the broken-power-law spectrum, providing a better fit for the experimental measurements than the simple power-law potential. Finally, we focus on implications for the primordial gravitational wave (PGW) spectrum. Should the zeropoint length be running over energy scales, as is the case for all parameters and coupling constants in quantum gravity under renormalization group considerations, deviations from general relativity (GR) might be potentially tested through upcoming PGW observatories.Springer2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1140/epjc/s10052-024-13035-7https://hdl.handle.net/10459.1/466199reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a https://doi.org/10.1140/epjc/s10052-024-13035-7The European Physical Journal C, 2024, vol. 84, 682cc-by (c) G. G. Luciano, A. Sheykhi, 2024Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/4661992026-06-24T12:42:17Z
dc.title.none.fl_str_mv Cosmology from string T-duality and zero-point length
title Cosmology from string T-duality and zero-point length
spellingShingle Cosmology from string T-duality and zero-point length
Luciano, Giuseppe Gaetano
T-duality
Cosmology
title_short Cosmology from string T-duality and zero-point length
title_full Cosmology from string T-duality and zero-point length
title_fullStr Cosmology from string T-duality and zero-point length
title_full_unstemmed Cosmology from string T-duality and zero-point length
title_sort Cosmology from string T-duality and zero-point length
dc.creator.none.fl_str_mv Luciano, Giuseppe Gaetano
Sheykhi, A.
author Luciano, Giuseppe Gaetano
author_facet Luciano, Giuseppe Gaetano
Sheykhi, A.
author_role author
author2 Sheykhi, A.
author2_role author
dc.subject.none.fl_str_mv T-duality
Cosmology
topic T-duality
Cosmology
description Inspired by string T-duality and taking into account the zero-point length correction, l0, to the gravitational potential, we construct modified Friedmann equations by applying the first law of thermodynamics on the apparent horizon of the Friedmann–Robertson–Walker (FRW) Universe. The cosmological viability of this extended scenario is investigated by studying influences on the evolution of the early Universe and performing cosmographic analysis. Furthermore, we explore the inflationary paradigm under the slow-roll condition. By testing the model against observational data, the zero-point length is constrained around the Planck scale, in compliance with the original assumption from string T-duality. We also study the growth of density perturbations in the linear regime. It is shown that the zeropoint length stands out as an alternative characterization for the broken-power-law spectrum, providing a better fit for the experimental measurements than the simple power-law potential. Finally, we focus on implications for the primordial gravitational wave (PGW) spectrum. Should the zeropoint length be running over energy scales, as is the case for all parameters and coupling constants in quantum gravity under renormalization group considerations, deviations from general relativity (GR) might be potentially tested through upcoming PGW observatories.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1140/epjc/s10052-024-13035-7
https://hdl.handle.net/10459.1/466199
url https://doi.org/10.1140/epjc/s10052-024-13035-7
https://hdl.handle.net/10459.1/466199
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a https://doi.org/10.1140/epjc/s10052-024-13035-7
The European Physical Journal C, 2024, vol. 84, 682
dc.rights.none.fl_str_mv cc-by (c) G. G. Luciano, A. Sheykhi, 2024
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) G. G. Luciano, A. Sheykhi, 2024
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
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repository.mail.fl_str_mv
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