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题名: Cosmological scaling solutions and cross-coupling exponential potential
作者: 郭宗宽 ;  Piao, YS ;  蔡荣根 ;  Zhang, YZ
刊名: PHYSICS LETTERS B
出版日期: 2003
卷号: 576, 期号:40910, 页码:12-17
关键词: INFLATIONARY UNIVERSE ;  SCALAR FIELDS ;  MODELS ;  SPACETIMES ;  FLATNESS ;  SCENARIO ;  HORIZON
学科分类: Physics
通讯作者: Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
部门归属: CCAST, World Lab, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000186824500003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14161
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Guo, ZK,Piao, YS,Cai, RG,et al. Cosmological scaling solutions and cross-coupling exponential potential[J]. PHYSICS LETTERS B,2003,576(40910):12-17.
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