Singularity and exit problems in two-dimensional string cosmology

A broad class of two-dimensional loop-corrected dilaton gravity models exhibit cosmological solutions that interpolate between the string perturbative vacuum and a background with asymptotically flat metric and linearly growing dilaton. The curvature singularities of the corresponding tree-level sol...

Descripción completa

Detalles Bibliográficos
Autores principales: Gasperini, M., Veneziano, G.
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(96)01122-7
http://cds.cern.ch/record/307147
_version_ 1780889862663045120
author Gasperini, M.
Veneziano, G.
author_facet Gasperini, M.
Veneziano, G.
author_sort Gasperini, M.
collection CERN
description A broad class of two-dimensional loop-corrected dilaton gravity models exhibit cosmological solutions that interpolate between the string perturbative vacuum and a background with asymptotically flat metric and linearly growing dilaton. The curvature singularities of the corresponding tree-level solutions are smoothed out, but no branch-change occurs. Thus, even in the presence of a non-perturbative potential, the system is not attracted by physically interesting fixed points with constant dilaton, and the exit problem of string cosmology persists.
id cern-307147
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3071472023-03-14T18:18:56Zdoi:10.1016/0370-2693(96)01122-7http://cds.cern.ch/record/307147engGasperini, M.Veneziano, G.Singularity and exit problems in two-dimensional string cosmologyParticle Physics - TheoryA broad class of two-dimensional loop-corrected dilaton gravity models exhibit cosmological solutions that interpolate between the string perturbative vacuum and a background with asymptotically flat metric and linearly growing dilaton. The curvature singularities of the corresponding tree-level solutions are smoothed out, but no branch-change occurs. Thus, even in the presence of a non-perturbative potential, the system is not attracted by physically interesting fixed points with constant dilaton, and the exit problem of string cosmology persists.A broad class of two-dimensional loop-corrected dilaton gravity models exhibit cosmological solutions that interpolate between the string perturbative vacuum and a background with asymptotically flat metric and linearly growing dilaton. The curvature singularities of the corresponding tree-level solutions are smoothed out, but no branch-change occurs. Thus, even in the presence of a non-perturbative potential, the system is not attracted by physically interesting fixed points with constant dilaton, and the exit problem of string cosmology persists.hep-th/9607126CERN-TH-96-165CERN-TH-96-165oai:cds.cern.ch:3071471996-07-16
spellingShingle Particle Physics - Theory
Gasperini, M.
Veneziano, G.
Singularity and exit problems in two-dimensional string cosmology
title Singularity and exit problems in two-dimensional string cosmology
title_full Singularity and exit problems in two-dimensional string cosmology
title_fullStr Singularity and exit problems in two-dimensional string cosmology
title_full_unstemmed Singularity and exit problems in two-dimensional string cosmology
title_short Singularity and exit problems in two-dimensional string cosmology
title_sort singularity and exit problems in two-dimensional string cosmology
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/0370-2693(96)01122-7
http://cds.cern.ch/record/307147
work_keys_str_mv AT gasperinim singularityandexitproblemsintwodimensionalstringcosmology
AT venezianog singularityandexitproblemsintwodimensionalstringcosmology

Ejemplares similares