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题名: Remarks on Definitions of Perturbation in General Relativity
作者: He Ping
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2009
卷号: 51, 期号:2, 页码:375-377
关键词: COSMOLOGICAL PERTURBATIONS ;  GAUGE TRANSFORMATIONS ;  INVARIANCE ;  2ND-ORDER ;  SPACETIME ;  UNIVERSE
学科分类: Physics
通讯作者: He, P , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100080, Peoples R China
英文摘要: There are two kinds of definitions of perturbation of physical quantities in the framework of general relativity: one is direct, the other is geometrical. Correspondingly, there are two types of gauge transformation related with these two definitions. The passive approach is based on the property of general covariance, and the active one is through the action of Lie-derivative. Although under a proper coordinate choice, the two approaches seem to agree with each other, they are different in nature. The geometrical definition of relativistic perturbation and the active approach for gauge transformation are more rigorous in mathematics and less confusing in physical explanation. The direct definition, however, seems to be plagued with difficulties in physical meaning, and the passive approach is more awkward to use, especially for high-order gauge transformations.
资助者: Scientific Research Foundation for the Returned Overseas Chinese Scholars; Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2.]
收录类别: SCI
WOS记录号: WOS:000263891900037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5397
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:
He Ping. Remarks on Definitions of Perturbation in General Relativity[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,51(2):375-377.
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