The Dark Energy Properties of the Dirac-Born-Infeld Action

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	The Dark Energy Properties of the Dirac-Born-Infeld Action
	Zhang, XY ; Zhang, Q ; Huang, YC
刊名	ENTROPY
	2012
卷号	14 期号:7 页码:1203-1220
关键词	COSMOLOGICAL CONSTANT INFLATIONARY UNIVERSE BRANE INFLATION CONSTRAINTS FLATNESS HORIZON FIELD MODEL
ISSN号	1099-4300
通讯作者	Zhang, XY (reprint author), Beijing Univ Technol, Inst Theoret Phys, Beijing 100124, Peoples R China.
英文摘要	Introducing a new potential, we deduce a general Lagrangian for Dirac-Born-Infeld (DBI) inflation, in which the determinant of the induced metric naturally includes the kinetic energy and the potential energy. In particular, the potential energy and kinetic energy can convert into each other at any same order, which is in agreement with the limit of classical physics. We also present a general sound speed in the evolutions of the universe, and the exact expressions of energy-momentum tensor, pressure and density. Furthermore, from the results we obtain the new equation of states. The analytic form of the action that is consistent with data turns out to be surprisingly simple and easy to categorize. Finally, we examine properties of the dark energy and introduce a novel mechanism for realizing either quintessence or phantom dark energy dominated phases within a string theoretical context.
学科主题	Physics
收录类别	SCI
资助信息	Chinese Academy of Sciences [KJCX2. YW. W10]; National Natural Science Foundation of China [10875009]; Beijing Natural Science Foundation [1072005]
原文出处	http://dx.doi.org/10.3390/e14071203
语种	英语
WOS记录号	WOS:000306748500006
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15069]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zhang, XY,Zhang, Q,Huang, YC. The Dark Energy Properties of the Dirac-Born-Infeld Action[J]. ENTROPY,2012,14(7):1203-1220.
APA	Zhang, XY,Zhang, Q,&Huang, YC.(2012).The Dark Energy Properties of the Dirac-Born-Infeld Action.ENTROPY,14(7),1203-1220.
MLA	Zhang, XY,et al."The Dark Energy Properties of the Dirac-Born-Infeld Action".ENTROPY 14.7(2012):1203-1220.