TOWARDS A SINGULARITY-FREE INFLATIONARY UNIVERSE

被引：141

作者：

KALOPER, N ^{[1
]}

MADDEN, R ^{[1
]}

OLIVE, KA ^{[1
]}

机构：

[1] UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455

来源：

NUCLEAR PHYSICS B | 1995年 / 452卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0550-3213(95)00398-C

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider the problem of constructing a non-singular inflationary universe in stringy gravity via branch changing, from a previously superexponentially expanding phase to an FRW-like phase. Our approach is based on the phase space analysis of the dynamics, and we obtain a no-go theorem which rules out the efficient scenario of branch changing catalyzed by dilaton potential and stringy fluid sources. We furthermore consider the effects of string-loop corrections to the gravitational action in the form recently suggested by Damour and Polyakov. These corrections also fail to produce the desired branch change. However, focusing on the possibility that these corrections may decouple the dilaton, we deduce that they may lead to an inflationary expansion in the presence of a cosmological constant, which asymptotically approaches Einstein-de Sitter solution.

引用

页码：677 / 702

页数：26

共 47 条

[41] INFLATION [J].