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The graceful exit problem in string cosmology
Isotropic string cosmology solutions can be classified into two duality related branches: one can be connected smoothly to an expanding Friedman-Robertson-Walker Universe, the other describes accelerated inflation or contraction. We show that, if the dilaton potential has certain generic properties,...
Autores principales: | , |
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Lenguaje: | eng |
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1994
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Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(94)91086-3 http://cds.cern.ch/record/260194 |
_version_ | 1780886145167523840 |
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author | Brustein, Ram Veneziano, G. |
author_facet | Brustein, Ram Veneziano, G. |
author_sort | Brustein, Ram |
collection | CERN |
description | Isotropic string cosmology solutions can be classified into two duality related branches: one can be connected smoothly to an expanding Friedman-Robertson-Walker Universe, the other describes accelerated inflation or contraction. We show that, if the dilaton potential has certain generic properties, the two branches can evolve smoothly into each other. We find, however, that just the effects of a potential do not allow for a graceful exit from accelerated inflation in the weak curvature regime. We explain how conformal field theory techniques could be used to give a decisive answer on whether graceful exit from accelerated inflation is possible at all. |
id | cern-260194 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1994 |
record_format | invenio |
spelling | cern-2601942023-03-14T18:59:35Zdoi:10.1016/0370-2693(94)91086-3http://cds.cern.ch/record/260194engBrustein, RamVeneziano, G.The graceful exit problem in string cosmologyGeneral Theoretical PhysicsParticle Physics - TheoryIsotropic string cosmology solutions can be classified into two duality related branches: one can be connected smoothly to an expanding Friedman-Robertson-Walker Universe, the other describes accelerated inflation or contraction. We show that, if the dilaton potential has certain generic properties, the two branches can evolve smoothly into each other. We find, however, that just the effects of a potential do not allow for a graceful exit from accelerated inflation in the weak curvature regime. We explain how conformal field theory techniques could be used to give a decisive answer on whether graceful exit from accelerated inflation is possible at all.Isotropic string cosmology solutions can be classified into two duality related branches: one can be connected smoothly to an expanding Friedman-Robertson-Walker Universe, the other describes accelerated inflation or contraction. We show that, if the dilaton potential has certain generic properties, the two branches can evolve smoothly into each other. We find, however, that just the effects of a potential do not allow for a graceful exit from accelerated inflation in the weak curvature regime. We explain how conformal field theory techniques could be used to give a decisive answer on whether graceful exit from accelerated inflation is possible at all.Isotropic string cosmology can be classified into duality related branches:one can be connected smoothyto an expanding Friedman-Robertson-Walker Universe, the describes accelerated inflation or contraction. We showthat, if the dilation potential has certain generic properties, the two branches can evolve smoothy into each other. We find,however, that just the effects of a potential do not allow for a graceful exit from accelerated inflation in the weak curvatureregime. We explain how conformal field theory techniques could be used to give a decisive answer on whether graceful exitfrom accelerated inflation is possible at all.hep-th/9403060CERN-TH-7179-94CERN-TH-7179-94oai:cds.cern.ch:2601941994 |
spellingShingle | General Theoretical Physics Particle Physics - Theory Brustein, Ram Veneziano, G. The graceful exit problem in string cosmology |
title | The graceful exit problem in string cosmology |
title_full | The graceful exit problem in string cosmology |
title_fullStr | The graceful exit problem in string cosmology |
title_full_unstemmed | The graceful exit problem in string cosmology |
title_short | The graceful exit problem in string cosmology |
title_sort | graceful exit problem in string cosmology |
topic | General Theoretical Physics Particle Physics - Theory |
url | https://dx.doi.org/10.1016/0370-2693(94)91086-3 http://cds.cern.ch/record/260194 |
work_keys_str_mv | AT brusteinram thegracefulexitprobleminstringcosmology AT venezianog thegracefulexitprobleminstringcosmology AT brusteinram gracefulexitprobleminstringcosmology AT venezianog gracefulexitprobleminstringcosmology |