The cosmological slingshot scenario: a stringy early times universe

Autores
Germani, Cristiano; Grandi, Nicolás Esteban; Kehagias, Alex
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a Klebanov-Strassler throat. We show that the horizon and isotropy problems of standard cosmology are avoided, while the flatness problem is acceptably alleviated. Regarding the primordial perturbations, we identify their vacuum state and elucidate the evolution from the quantum to the classical regimes. Also, we calculate their exact power spectrum showing its compatibility with current data. We discuss the bouncing solution from a four dimensional point of view. In this framework the radial and angular motion of the Slingshot brane are described by two scalar fields. We show that the bouncing solution for the scale factor in String frame is mapped into a monotonically increasing (in conformal time) solution in the Einstein frame. We finally discuss about the regularity of the geometry in Einstein frame.
Fil: Germani, Cristiano. University of Cambridge; Estados Unidos
Fil: Grandi, Nicolás Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Kehagias, Alex. National Technical University Of Athens; Grecia
Materia
Cosmología
Branas
Cuerdas
Inflación
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:11336/279536
Acceder
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spelling The cosmological slingshot scenario: a stringy early times universeGermani, CristianoGrandi, Nicolás EstebanKehagias, AlexCosmologíaBranasCuerdasInflaciónhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a Klebanov-Strassler throat. We show that the horizon and isotropy problems of standard cosmology are avoided, while the flatness problem is acceptably alleviated. Regarding the primordial perturbations, we identify their vacuum state and elucidate the evolution from the quantum to the classical regimes. Also, we calculate their exact power spectrum showing its compatibility with current data. We discuss the bouncing solution from a four dimensional point of view. In this framework the radial and angular motion of the Slingshot brane are described by two scalar fields. We show that the bouncing solution for the scale factor in String frame is mapped into a monotonically increasing (in conformal time) solution in the Einstein frame. We finally discuss about the regularity of the geometry in Einstein frame.Fil: Germani, Cristiano. University of Cambridge; Estados UnidosFil: Grandi, Nicolás Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Kehagias, Alex. National Technical University Of Athens; GreciaIOP Publishing2008-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/279536Germani, Cristiano; Grandi, Nicolás Esteban; Kehagias, Alex; The cosmological slingshot scenario: a stringy early times universe; IOP Publishing; Classical and Quantum Gravity; 25; 13; 6-2008; 1-320264-9381CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0264-9381/25/13/135004info:eu-repo/semantics/altIdentifier/doi/10.1088/0264-9381/25/13/135004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:32:20Zoai:ri.conicet.gov.ar:11336/279536instacron: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:34982026-02-26 10:32:20.328CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The cosmological slingshot scenario: a stringy early times universe
title The cosmological slingshot scenario: a stringy early times universe
spellingShingle The cosmological slingshot scenario: a stringy early times universe
Germani, Cristiano
Cosmología
Branas
Cuerdas
Inflación
title_short The cosmological slingshot scenario: a stringy early times universe
title_full The cosmological slingshot scenario: a stringy early times universe
title_fullStr The cosmological slingshot scenario: a stringy early times universe
title_full_unstemmed The cosmological slingshot scenario: a stringy early times universe
title_sort The cosmological slingshot scenario: a stringy early times universe
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 Cosmología
Branas
Cuerdas
Inflación
topic Cosmología
Branas
Cuerdas
Inflación
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a Klebanov-Strassler throat. We show that the horizon and isotropy problems of standard cosmology are avoided, while the flatness problem is acceptably alleviated. Regarding the primordial perturbations, we identify their vacuum state and elucidate the evolution from the quantum to the classical regimes. Also, we calculate their exact power spectrum showing its compatibility with current data. We discuss the bouncing solution from a four dimensional point of view. In this framework the radial and angular motion of the Slingshot brane are described by two scalar fields. We show that the bouncing solution for the scale factor in String frame is mapped into a monotonically increasing (in conformal time) solution in the Einstein frame. We finally discuss about the regularity of the geometry in Einstein frame.
Fil: Germani, Cristiano. University of Cambridge; Estados Unidos
Fil: Grandi, Nicolás Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Kehagias, Alex. National Technical University Of Athens; Grecia
description We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a Klebanov-Strassler throat. We show that the horizon and isotropy problems of standard cosmology are avoided, while the flatness problem is acceptably alleviated. Regarding the primordial perturbations, we identify their vacuum state and elucidate the evolution from the quantum to the classical regimes. Also, we calculate their exact power spectrum showing its compatibility with current data. We discuss the bouncing solution from a four dimensional point of view. In this framework the radial and angular motion of the Slingshot brane are described by two scalar fields. We show that the bouncing solution for the scale factor in String frame is mapped into a monotonically increasing (in conformal time) solution in the Einstein frame. We finally discuss about the regularity of the geometry in Einstein frame.
publishDate 2008
dc.date.none.fl_str_mv 2008-06
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/11336/279536
Germani, Cristiano; Grandi, Nicolás Esteban; Kehagias, Alex; The cosmological slingshot scenario: a stringy early times universe; IOP Publishing; Classical and Quantum Gravity; 25; 13; 6-2008; 1-32
0264-9381
CONICET Digital
CONICET
url http://hdl.handle.net/11336/279536
identifier_str_mv Germani, Cristiano; Grandi, Nicolás Esteban; Kehagias, Alex; The cosmological slingshot scenario: a stringy early times universe; IOP Publishing; Classical and Quantum Gravity; 25; 13; 6-2008; 1-32
0264-9381
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://iopscience.iop.org/article/10.1088/0264-9381/25/13/135004
info:eu-repo/semantics/altIdentifier/doi/10.1088/0264-9381/25/13/135004
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 12.665996

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