Timelike vector field dynamics in the early universe

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	Timelike vector field dynamics in the early universe
	Koh, S ; Hu, B
刊名	JOURNAL OF THE KOREAN PHYSICAL SOCIETY
	2012
卷号	60 期号:11 页码:1983-1992
关键词	MICROWAVE SUPERNOVAE
ISSN号	0374-4884
通讯作者	Koh, S (reprint author), Jeju Natl Univ, Dept Sci Educ, Cheju 690756, South Korea.
英文摘要	We study the dynamics of a timelike vector field when the background spacetime is in an accelerating phase in the early universe. With a timelike vector field, an inflationary phase is shown to be difficult to realize, so we investigate the evolution of a vector field within a scalar field-driven inflation model. Also, we calculate the power spectrum of the vector field without considering the metric perturbations. While the time component of the vector field perturbations provides a scale invariant spectrum when zeta = 0, where zeta is a nonminimal coupling parameter, both the longitudinal and the transverse perturbations give a scale invariant spectrum when zeta = 1/6 in the absence of the coupling terms. The deviation of the power spectrum due to the coupling terms is calculated by use of the Greens' function.
学科主题	Physics
收录类别	SCI
资助信息	National Research Foundation of Korea (NRF); Ministry of Education, Science and Technology [2011-0025976]; Chinese Academy of Sciences [KJCX3-SYW-N2]; NSFC [10821504, 10525060]
原文出处	http://dx.doi.org/10.3938/jkps.60.1983
语种	英语
WOS记录号	WOS:000305223000029
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15089]
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	Koh, S,Hu, B. Timelike vector field dynamics in the early universe[J]. JOURNAL OF THE KOREAN PHYSICAL SOCIETY,2012,60(11):1983-1992.
APA	Koh, S,&Hu, B.(2012).Timelike vector field dynamics in the early universe.JOURNAL OF THE KOREAN PHYSICAL SOCIETY,60(11),1983-1992.
MLA	Koh, S,et al."Timelike vector field dynamics in the early universe".JOURNAL OF THE KOREAN PHYSICAL SOCIETY 60.11(2012):1983-1992.