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Scalar perturbations in regular two-component bouncing cosmologies

We consider a two-component regular cosmology bouncing from contraction to expansion, where, in order to include both scalar fields and perfect fluids as particular cases, the dominant component is allowed to have an intrinsic isocurvature mode. We show that the spectrum of the growing mode of the B...

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Detalles Bibliográficos
Autores principales: Bozza, V., Veneziano, G.
Lenguaje:eng
Publicado: 2005
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2005.08.052
http://cds.cern.ch/record/820479
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author Bozza, V.
Veneziano, G.
author_facet Bozza, V.
Veneziano, G.
author_sort Bozza, V.
collection CERN
description We consider a two-component regular cosmology bouncing from contraction to expansion, where, in order to include both scalar fields and perfect fluids as particular cases, the dominant component is allowed to have an intrinsic isocurvature mode. We show that the spectrum of the growing mode of the Bardeen potential in the pre-bounce is never transferred to the dominant mode of the post-bounce. The latter acquires at most a dominant isocurvature component, depending on the relative properties of the two fluids. Our results imply that several claims in the literature need substantial revision.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
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spelling cern-8204792023-03-14T20:55:52Zdoi:10.1016/j.physletb.2005.08.052http://cds.cern.ch/record/820479engBozza, V.Veneziano, G.Scalar perturbations in regular two-component bouncing cosmologiesParticle Physics - TheoryWe consider a two-component regular cosmology bouncing from contraction to expansion, where, in order to include both scalar fields and perfect fluids as particular cases, the dominant component is allowed to have an intrinsic isocurvature mode. We show that the spectrum of the growing mode of the Bardeen potential in the pre-bounce is never transferred to the dominant mode of the post-bounce. The latter acquires at most a dominant isocurvature component, depending on the relative properties of the two fluids. Our results imply that several claims in the literature need substantial revision.We consider a two-component regular cosmology bouncing from contraction to expansion, where, in order to include both scalar fields and perfect fluids as particular cases, the dominant component is allowed to have an intrinsic isocurvature mode. We show that the spectrum of the growing mode of the Bardeen potential in the pre-bounce is never transferred to the dominant mode of the post-bounce. The latter acquires at most a dominant isocurvature component, depending on the relative properties of the two fluids. Our results imply that several claims in the literature need substantial revision.We consider a two-component regular cosmology bouncing from contraction to expansion, where, in order to include both scalar fields and perfect fluids as particular cases, the dominant component is allowed to have an intrinsic isocurvature mode. We show that the spectrum of the growing mode of the Bardeen potential in the Pre-Bounce is never transferred to the dominant mode of the Post-Bounce. The latter acquires at most a dominant isocurvature component, depending on the relative properties of the two fluids. Our results imply that several claims in the literature need substantial revision.hep-th/0502047CERN-PH-TH-2005-19CERN-PH-TH-2005-019oai:cds.cern.ch:8204792005-02-03
spellingShingle Particle Physics - Theory
Bozza, V.
Veneziano, G.
Scalar perturbations in regular two-component bouncing cosmologies
title Scalar perturbations in regular two-component bouncing cosmologies
title_full Scalar perturbations in regular two-component bouncing cosmologies
title_fullStr Scalar perturbations in regular two-component bouncing cosmologies
title_full_unstemmed Scalar perturbations in regular two-component bouncing cosmologies
title_short Scalar perturbations in regular two-component bouncing cosmologies
title_sort scalar perturbations in regular two-component bouncing cosmologies
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/j.physletb.2005.08.052
http://cds.cern.ch/record/820479
work_keys_str_mv AT bozzav scalarperturbationsinregulartwocomponentbouncingcosmologies
AT venezianog scalarperturbationsinregulartwocomponentbouncingcosmologies