Comments on joint terms in gravitational action

doi:http://dx.doi.org/10.1088/1361-6382/aa8053

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	Comments on joint terms in gravitational action
	Yang, RQ; Yang, RQ (reprint author), Korea Inst Adv Study, Quantum Univ Ctr, Seoul 130722, South Korea.; Ruan, SM
刊名	CLASSICAL AND QUANTUM GRAVITY
	2017
卷号	34 期号:17 页码:175017
关键词	Action In Gravity Theory Joint Terms Piecewise Smooth Boundary
DOI	http://dx.doi.org/10.1088/1361-6382/aa8053
英文摘要	This paper compares three different methods of computing joint terms in the on-shell action of gravity, which are identifying the joint term by the variational principle in the Dirichlet boundary condition, treating the joint term as the limit contribution of a smooth boundary and finding the joint term by local SO(1, d - 1) transformation. In general metric gravitational theory, we show that the differences between these joint terms are variational invariants under a fixed boundary condition. We also give an explicit condition to judge the existence of a joint term determined by the variational principle and apply it to general relativity as an example.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21974]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Yang, RQ (reprint author), Korea Inst Adv Study, Quantum Univ Ctr, Seoul 130722, South Korea.
推荐引用方式 GB/T 7714	Yang, RQ,Yang, RQ ,Ruan, SM. Comments on joint terms in gravitational action[J]. CLASSICAL AND QUANTUM GRAVITY,2017,34(17):175017.
APA	Yang, RQ,Yang, RQ ,&Ruan, SM.(2017).Comments on joint terms in gravitational action.CLASSICAL AND QUANTUM GRAVITY,34(17),175017.
MLA	Yang, RQ,et al."Comments on joint terms in gravitational action".CLASSICAL AND QUANTUM GRAVITY 34.17(2017):175017.