重力中的BMS对称:正面形式与即时形式

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

International Journal of Modern Physics D Pub Date : 2023-05-16 DOI:10.1142/s0218271823420014

S. Ananth, Sucheta Majumdar

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引用次数: 0

摘要

在广义相对论中，渐近无穷处的微分同态或规范变换的允许集形成了BMS群，这是庞加莱群的无限维扩展。我们将重点放在两种不同形式的哈密顿动力学中BMS群的结构——瞬时和前沿形式。这两种形式的相似性和差异性都被检查，同时强调非协变方法在重力对称性中的作用。

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BMS symmetry in gravity: Front form versus Instant form

In General Relativity, the allowed set of diffeomorphisms or gauge transformations at asymptotic infinity forms the BMS group, an infinite-dimensional extension of the Poincar\'e group. We focus on the structure of the BMS group in two distinct forms of Hamiltonian dynamics - the instant and front forms. Both similarities and differences in these two forms are examined while emphasising the role of non-covariant approaches to symmetries in gravity.

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来源期刊

International Journal of Modern Physics D 地学天文-天文与天体物理

CiteScore

3.80

自引率

9.10%

发文量

181

审稿时长

4-8 weeks

期刊介绍： Gravitation, astrophysics and cosmology are exciting and rapidly advancing fields of research. This journal aims to accommodate and promote this expansion of information and ideas and it features research papers and reviews on theoretical, observational and experimental findings in these fields. Among the topics covered are general relativity, quantum gravity, gravitational experiments, quantum cosmology, observational cosmology, particle cosmology, large scale structure, high energy astrophysics, compact objects, cosmic particles and radiation.