Reconstruction of inflationary scenarios in non-conservative unimodular gravity

Autores
Piccirilli, María Pía; Leon Garcia, Gabriel
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Unimodular gravity is an alternative theory of gravity to general relativity. The gravitational field equations are given by the trace-free version of Einstein’s field equations. Due to the structure of the theory, unimodular gravity admits a diffusion term that characterizes a possible non-conservation of the canonical energy-momentum tensor locally. Employing this feature of unimodular gravity, in the present work, we explicitly show how to construct an inflationary phase that can be contrasted with current observations. In particular, we focus on three different inflationary scenarios of physical interest. An important element in these scenarios is that the accelerated expansion is driven by the diffusion term exclusively, i.e. there is no inflaton. Furthermore, the primordial spectrum during inflation is generated by considering inhomogeneous perturbations associated to standard hydrodynamical matter (modeled as a single ultra-relativistic fluid). For each of the scenarios, we obtain the prediction for the primordial spectrum and contrast it with recent observational bounds.
Fil: Piccirilli, María Pía. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Leon Garcia, Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Materia
(COSMOLOGY:) COSMIC MICROWAVE BACKGROUND
(COSMOLOGY:) COSMOLOGICAL PARAMETERS
(COSMOLOGY:) EARLY UNIVERSE
(COSMOLOGY:) INFLATION
(COSMOLOGY:) OBSERVATIONS
(COSMOLOGY:) THEORY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/220395
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Reconstruction of inflationary scenarios in non-conservative unimodular gravityPiccirilli, María PíaLeon Garcia, Gabriel(COSMOLOGY:) COSMIC MICROWAVE BACKGROUND(COSMOLOGY:) COSMOLOGICAL PARAMETERS(COSMOLOGY:) EARLY UNIVERSE(COSMOLOGY:) INFLATION(COSMOLOGY:) OBSERVATIONS(COSMOLOGY:) THEORYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Unimodular gravity is an alternative theory of gravity to general relativity. The gravitational field equations are given by the trace-free version of Einstein’s field equations. Due to the structure of the theory, unimodular gravity admits a diffusion term that characterizes a possible non-conservation of the canonical energy-momentum tensor locally. Employing this feature of unimodular gravity, in the present work, we explicitly show how to construct an inflationary phase that can be contrasted with current observations. In particular, we focus on three different inflationary scenarios of physical interest. An important element in these scenarios is that the accelerated expansion is driven by the diffusion term exclusively, i.e. there is no inflaton. Furthermore, the primordial spectrum during inflation is generated by considering inhomogeneous perturbations associated to standard hydrodynamical matter (modeled as a single ultra-relativistic fluid). For each of the scenarios, we obtain the prediction for the primordial spectrum and contrast it with recent observational bounds.Fil: Piccirilli, María Pía. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Leon Garcia, Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaWiley Blackwell Publishing, Inc2023-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/220395Piccirilli, María Pía; Leon Garcia, Gabriel; Reconstruction of inflationary scenarios in non-conservative unimodular gravity; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 3; 7-2023; 4024-40360035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stad2095/7223472info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2095info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:12:49Zoai:ri.conicet.gov.ar:11336/220395instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:12:49.965CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Reconstruction of inflationary scenarios in non-conservative unimodular gravity
title Reconstruction of inflationary scenarios in non-conservative unimodular gravity
spellingShingle Reconstruction of inflationary scenarios in non-conservative unimodular gravity
Piccirilli, María Pía
(COSMOLOGY:) COSMIC MICROWAVE BACKGROUND
(COSMOLOGY:) COSMOLOGICAL PARAMETERS
(COSMOLOGY:) EARLY UNIVERSE
(COSMOLOGY:) INFLATION
(COSMOLOGY:) OBSERVATIONS
(COSMOLOGY:) THEORY
title_short Reconstruction of inflationary scenarios in non-conservative unimodular gravity
title_full Reconstruction of inflationary scenarios in non-conservative unimodular gravity
title_fullStr Reconstruction of inflationary scenarios in non-conservative unimodular gravity
title_full_unstemmed Reconstruction of inflationary scenarios in non-conservative unimodular gravity
title_sort Reconstruction of inflationary scenarios in non-conservative unimodular gravity
dc.creator.none.fl_str_mv Piccirilli, María Pía
Leon Garcia, Gabriel
author Piccirilli, María Pía
author_facet Piccirilli, María Pía
Leon Garcia, Gabriel
author_role author
author2 Leon Garcia, Gabriel
author2_role author
dc.subject.none.fl_str_mv (COSMOLOGY:) COSMIC MICROWAVE BACKGROUND
(COSMOLOGY:) COSMOLOGICAL PARAMETERS
(COSMOLOGY:) EARLY UNIVERSE
(COSMOLOGY:) INFLATION
(COSMOLOGY:) OBSERVATIONS
(COSMOLOGY:) THEORY
topic (COSMOLOGY:) COSMIC MICROWAVE BACKGROUND
(COSMOLOGY:) COSMOLOGICAL PARAMETERS
(COSMOLOGY:) EARLY UNIVERSE
(COSMOLOGY:) INFLATION
(COSMOLOGY:) OBSERVATIONS
(COSMOLOGY:) THEORY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Unimodular gravity is an alternative theory of gravity to general relativity. The gravitational field equations are given by the trace-free version of Einstein’s field equations. Due to the structure of the theory, unimodular gravity admits a diffusion term that characterizes a possible non-conservation of the canonical energy-momentum tensor locally. Employing this feature of unimodular gravity, in the present work, we explicitly show how to construct an inflationary phase that can be contrasted with current observations. In particular, we focus on three different inflationary scenarios of physical interest. An important element in these scenarios is that the accelerated expansion is driven by the diffusion term exclusively, i.e. there is no inflaton. Furthermore, the primordial spectrum during inflation is generated by considering inhomogeneous perturbations associated to standard hydrodynamical matter (modeled as a single ultra-relativistic fluid). For each of the scenarios, we obtain the prediction for the primordial spectrum and contrast it with recent observational bounds.
Fil: Piccirilli, María Pía. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Leon Garcia, Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
description Unimodular gravity is an alternative theory of gravity to general relativity. The gravitational field equations are given by the trace-free version of Einstein’s field equations. Due to the structure of the theory, unimodular gravity admits a diffusion term that characterizes a possible non-conservation of the canonical energy-momentum tensor locally. Employing this feature of unimodular gravity, in the present work, we explicitly show how to construct an inflationary phase that can be contrasted with current observations. In particular, we focus on three different inflationary scenarios of physical interest. An important element in these scenarios is that the accelerated expansion is driven by the diffusion term exclusively, i.e. there is no inflaton. Furthermore, the primordial spectrum during inflation is generated by considering inhomogeneous perturbations associated to standard hydrodynamical matter (modeled as a single ultra-relativistic fluid). For each of the scenarios, we obtain the prediction for the primordial spectrum and contrast it with recent observational bounds.
publishDate 2023
dc.date.none.fl_str_mv 2023-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/220395
Piccirilli, María Pía; Leon Garcia, Gabriel; Reconstruction of inflationary scenarios in non-conservative unimodular gravity; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 3; 7-2023; 4024-4036
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/220395
identifier_str_mv Piccirilli, María Pía; Leon Garcia, Gabriel; Reconstruction of inflationary scenarios in non-conservative unimodular gravity; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 3; 7-2023; 4024-4036
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stad2095/7223472
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2095
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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