Cosmological perturbations across a curvature bounce

String-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, $T$-duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matchin...

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Detalles Bibliográficos
Autores principales: Gasperini, M., Giovannini, Massimo, Veneziano, G.
Lenguaje:eng
Publicado: 2004
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysb.2004.06.020
http://cds.cern.ch/record/706585
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author Gasperini, M.
Giovannini, Massimo
Veneziano, G.
author_facet Gasperini, M.
Giovannini, Massimo
Veneziano, G.
author_sort Gasperini, M.
collection CERN
description String-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, $T$-duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matching conditions across the bounce. Good agreement is found if continuity across the bounce is assumed to hold for $\cal{R}$, the curvature perturbation on comoving hypersurfaces, rather than for the Bardeen potential.
id cern-706585
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2004
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spelling cern-7065852023-03-14T20:05:03Zdoi:10.1016/j.nuclphysb.2004.06.020http://cds.cern.ch/record/706585engGasperini, M.Giovannini, MassimoVeneziano, G.Cosmological perturbations across a curvature bounceParticle Physics - TheoryString-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, $T$-duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matching conditions across the bounce. Good agreement is found if continuity across the bounce is assumed to hold for $\cal{R}$, the curvature perturbation on comoving hypersurfaces, rather than for the Bardeen potential.String-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, $T$-duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matching conditions across the bounce. Good agreement is found if continuity across the bounce is assumed to hold for $\cal{R}$, the curvature perturbation on comoving hypersurfaces, rather than for the Bardeen potential.String-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, T -duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matching conditions across the bounce. Good agreement is found if continuity across the bounce is assumed to hold for R , the curvature perturbation on comoving hypersurfaces, rather than for the Bardeen potential.hep-th/0401112BA-TH-03-465CERN-TH-2003-257NSF-KITP-04-07CERN-TH-2003-257oai:cds.cern.ch:7065852004-01-16
spellingShingle Particle Physics - Theory
Gasperini, M.
Giovannini, Massimo
Veneziano, G.
Cosmological perturbations across a curvature bounce
title Cosmological perturbations across a curvature bounce
title_full Cosmological perturbations across a curvature bounce
title_fullStr Cosmological perturbations across a curvature bounce
title_full_unstemmed Cosmological perturbations across a curvature bounce
title_short Cosmological perturbations across a curvature bounce
title_sort cosmological perturbations across a curvature bounce
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/j.nuclphysb.2004.06.020
http://cds.cern.ch/record/706585
work_keys_str_mv AT gasperinim cosmologicalperturbationsacrossacurvaturebounce
AT giovanninimassimo cosmologicalperturbationsacrossacurvaturebounce
AT venezianog cosmologicalperturbationsacrossacurvaturebounce

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