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Cosmological scaling solutions and cross-coupling exponential potential
Guo, ZK; Piao, YS; Cai, RG; Zhang, YZ; Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
2003
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号576期号:40910页码:12-17
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.
部门归属CCAST, World Lab, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Inflationary Universe Scalar Fields Models Spacetimes Flatness Scenario Horizon
学科领域Physics
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收录类别SCI
WOS记录号WOS:000186824500003
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被引频次:36[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14161
专题理论物理所1978-2010年知识产出
通讯作者Guo, ZK , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
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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.
APA Guo, ZK,Piao, YS,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 Guo, ZK,et al."Cosmological scaling solutions and cross-coupling exponential potential".PHYSICS LETTERS B 576.40910(2003):12-17.
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