Dynamical scalar degree of freedom in Horcava-Lifshitz gravity

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	Dynamical scalar degree of freedom in Horcava-Lifshitz gravity
	Cai, RG ; Hu, B ; Zhang, HB
刊名	PHYSICAL REVIEW D
	2009
卷号	80 期号:4
关键词	MASSIVE GAUGE-THEORIES PHYSICS
ISSN号	1550-7998
通讯作者	Cai, RG: Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
中文摘要	We investigate the linear cosmological perturbations of Horcava-Lifshitz gravity in a Friedmann-Robertson-Walker universe without any matter. Our results show that a new gauge-invariant dynamical scalar mode emerges, due to the gauge transformation under the "foliation-preserving" diffeomorphism and "projectability condition," and it can produce a scale invariant power spectrum. In the infrared regime with lambda=1, the dynamical scalar degree of freedom turns to be a nondynamical one at the linear order level.
收录类别	SCI
资助信息	Chinese Academy of Sciences [KJCX3-SYW-N2]; NSFC [10821504, 10525060]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36281]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Cai, RG,Hu, B,Zhang, HB. Dynamical scalar degree of freedom in Horcava-Lifshitz gravity[J]. PHYSICAL REVIEW D,2009,80(4).
APA	Cai, RG,Hu, B,&Zhang, HB.(2009).Dynamical scalar degree of freedom in Horcava-Lifshitz gravity.PHYSICAL REVIEW D,80(4).
MLA	Cai, RG,et al."Dynamical scalar degree of freedom in Horcava-Lifshitz gravity".PHYSICAL REVIEW D 80.4(2009).