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题名: Comments on joint terms in gravitational action
作者: Yang, RQ ;  Ruan, SM
刊名: CLASSICAL AND QUANTUM GRAVITY
出版日期: 2017
卷号: 34, 期号:17, 页码:175017
关键词: action in gravity theory ;  joint terms ;  piecewise smooth boundary
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1088/1361-6382/aa8053
通讯作者: Yang, RQ (reprint author), Korea Inst Adv Study, Quantum Univ Ctr, Seoul 130722, South Korea.
文章类型: Article
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.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Multidisciplinary ;  Physics, Particles & Fields
关键词[WOS]: BOUNDARIES ;  GRAVITY ;  NULL
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21974
Appears in Collections:理论物理所2017年知识产出_期刊论文

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Recommended Citation:
Yang, RQ,Ruan, SM. Comments on joint terms in gravitational action[J]. CLASSICAL AND QUANTUM GRAVITY,2017,34(17):175017.
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