Bouncing universes in string-inspired gravity

被引：447

作者：

Biswas, T

Mazumdar, A

Siegel, W

机构：

[1] McGill Univ, Montreal, PQ H3A 2T5, Canada

[2] NORDITA, DK-2100 Copenhagen, Denmark

[3] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2006年 / 03期

基金：

美国国家科学基金会;

关键词：

string theory and cosmology; gravity; quantum gravity phenomenology; physics of the early universe;

D O I：

10.1088/1475-7516/2006/03/009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the effects on cosmology of higher derivative modi. cations of gravity that make it asymptotically free without introducing ghosts. The weakening of gravity at short distances allows pressure to prevent a singularity, producing a solution with contraction preceding expansion.

引用

页数：27

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