Cosmological scaling solutions and cross-coupling exponential potential

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	Cosmological scaling solutions and cross-coupling exponential potential
	Piao, YS; Guo, ZK; Cai, RG; Zhang, YZ; Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
刊名	PHYSICS LETTERS B
	2003
卷号	576 期号:40910 页码:12-17
关键词	Inflationary Universe Scalar Fields Models Spacetimes Flatness Scenario Horizon
ISSN号	0370-2693
英文摘要	We present a phase-space analysis of cosmology containing multiple scalar fields with a positive or negative cross-coupling exponential potential. We show that there exist power-law kinetic-potential-scaling solutions for a sufficiently flat positive potential or for a steep negative potential. The former is the unique late-time attractor, but it is difficult to yield assisted inflation. The later is never stable in an expanding universe. Moreover, for a steep negative potential there exists a kinetic-dominated regime in which each solution is a late-time attractor. In the presence of ordinary matter these scaling solutions with a negative cross-coupling potential are found unstable. We briefly discuss the physical consequences of these results. (C) 2003 Elsevier B.V. All rights reserved.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000186824500003
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14161]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Piao, YS,Guo, ZK,Cai, RG,et al. Cosmological scaling solutions and cross-coupling exponential potential[J]. PHYSICS LETTERS B,2003,576(40910):12-17.
APA	Piao, YS,Guo, ZK,Cai, RG,Zhang, YZ,&Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China..(2003).Cosmological scaling solutions and cross-coupling exponential potential.PHYSICS LETTERS B,576(40910),12-17.
MLA	Piao, YS,et al."Cosmological scaling solutions and cross-coupling exponential potential".PHYSICS LETTERS B 576.40910(2003):12-17.