The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology

Autores
Germani, Cristiano; Grandi, Nicolás Esteban; Kehagias, Alex
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the Cosmological Slingshot Scenario, our Universe is a D3-brane that extends in the 4d noncompact directions of a warped Calabi-Yau compactification of IIB Supergravity. Early time cosmology corresponds to a period in which the brane moves inside a warped throat where a non-vanishing angular momentum ensures that the trajectory of the brane has a turning point. The corresponding induced metric on the D3-brane experiences a cosmological evolution with a bounce. In this framework, the homogeneity, flatness, and isotropy problems of standard cosmology might be avoided. The power spectrum of primordial perturbations of the brane embedding can be found and it is shown to be in agreement to WMAP data.
Instituto de Física La Plata
Materia
Física
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/129201
Acceder
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time CosmologyGermani, CristianoGrandi, Nicolás EstebanKehagias, AlexFísicaIn the Cosmological Slingshot Scenario, our Universe is a D3-brane that extends in the 4d noncompact directions of a warped Calabi-Yau compactification of IIB Supergravity. Early time cosmology corresponds to a period in which the brane moves inside a warped throat where a non-vanishing angular momentum ensures that the trajectory of the brane has a turning point. The corresponding induced metric on the D3-brane experiences a cosmological evolution with a bounce. In this framework, the homogeneity, flatness, and isotropy problems of standard cosmology might be avoided. The power spectrum of primordial perturbations of the brane embedding can be found and it is shown to be in agreement to WMAP data.Instituto de Física La Plata2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf172-183http://sedici.unlp.edu.ar/handle/10915/129201enginfo:eu-repo/semantics/altIdentifier/issn/0094-243Xinfo:eu-repo/semantics/altIdentifier/arxiv/0805.2073info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2972004info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-02-26T11:18:12Zoai:sedici.unlp.edu.ar:10915/129201Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-02-26 11:18:12.588SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
title The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
spellingShingle The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
Germani, Cristiano
Física
title_short The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
title_full The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
title_fullStr The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
title_full_unstemmed The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
title_sort The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology
dc.creator.none.fl_str_mv Germani, Cristiano
Grandi, Nicolás Esteban
Kehagias, Alex
author Germani, Cristiano
author_facet Germani, Cristiano
Grandi, Nicolás Esteban
Kehagias, Alex
author_role author
author2 Grandi, Nicolás Esteban
Kehagias, Alex
author2_role author
author
dc.subject.none.fl_str_mv Física
topic Física
dc.description.none.fl_txt_mv In the Cosmological Slingshot Scenario, our Universe is a D3-brane that extends in the 4d noncompact directions of a warped Calabi-Yau compactification of IIB Supergravity. Early time cosmology corresponds to a period in which the brane moves inside a warped throat where a non-vanishing angular momentum ensures that the trajectory of the brane has a turning point. The corresponding induced metric on the D3-brane experiences a cosmological evolution with a bounce. In this framework, the homogeneity, flatness, and isotropy problems of standard cosmology might be avoided. The power spectrum of primordial perturbations of the brane embedding can be found and it is shown to be in agreement to WMAP data.
Instituto de Física La Plata
description In the Cosmological Slingshot Scenario, our Universe is a D3-brane that extends in the 4d noncompact directions of a warped Calabi-Yau compactification of IIB Supergravity. Early time cosmology corresponds to a period in which the brane moves inside a warped throat where a non-vanishing angular momentum ensures that the trajectory of the brane has a turning point. The corresponding induced metric on the D3-brane experiences a cosmological evolution with a bounce. In this framework, the homogeneity, flatness, and isotropy problems of standard cosmology might be avoided. The power spectrum of primordial perturbations of the brane embedding can be found and it is shown to be in agreement to WMAP data.
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/129201
url http://sedici.unlp.edu.ar/handle/10915/129201
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0094-243X
info:eu-repo/semantics/altIdentifier/arxiv/0805.2073
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2972004
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
172-183
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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