Classical corrections in string cosmology

Citation
R. Brustein et R. Madden, Classical corrections in string cosmology, J HIGH EN P, (7), 1999, pp. NIL_118-NIL_143
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
1029-8479 → ACNP
Issue
7
Year of publication
1999
Pages
NIL_118 - NIL_143
Database
ISI
SICI code
1029-8479(19991006):7<NIL_118:CCISC>2.0.ZU;2-B
Abstract
An important element in a model of non-singular string cosmology is a phase in which classical corrections saturate the growth of curvature in a deSit ter-like phase with a linearly growing dilaton (an 'algebraic fixed point') . As the form of the classical corrections is not well known, here we look for evidence, based on a suggested symmetry of the action, scale factor dua lity and on conformal field theory considerations, that they can produce th is saturation. It has previously been observed that imposing scale factor d uality on the O(alpha') corrections is not compatible with fixed point beha vior. Here we present arguments that these problems persist to all orders i n alpha'. We also present evidence for the form of a solution to the equati ons of motion using conformal perturbation theory, examine its implications for the form of the effective action and find novel fixed point structure.