arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2603.08784hep-thgr-qc
收藏

在空间无穷远处的对数超平移的协变 formulation

A Covariant Formulation of Logarithmic Supertranslations at Spatial Infinity

University of Waterloo(滑铁卢大学);Perimeter Institute for Theoretical Physics(理论物理前沿研究所);SISSA, International School for Advanced Studies(国际高等研究院);INFN, Sezione di Trieste(意大利国家核物理研究所的里雅斯特分部);Collège de France(法兰西学院)

Florian Girelli, Simon Langenscheidt, Giulio Neri, Christopher Pollack, Celine Zwikel

AI总结:

本文提出在空间无穷远处的对数超平移的协变 formulation,扩展了BMS代数,揭示了新的物理信息。

摘要:

我们研究了渐近平坦时空在空间无穷远处的渐近对称性。我们提出了一种新的辛结构和保守边界条件,在多齐次的Beig-Schmidt展开中。渐近对称性通过阿贝尔部分扩展了BMS代数,特别地,包括规则的对数平移和对数超平移。相关的荷是有限的且守恒的,我们证明其代数在超平移和对数超平移之间,以及在奇异平移和规则对数平移之间具有中心扩展。我们的分析与arXiv:1106.4045和arXiv:2211.10941的工作相容并扩展:它通过引入对数超平移扩展前者,通过允许对数超平移在同一个相空间中具有两种奇异性扩展后者。这些在空间无穷远处新识别的对称性编码了尚未在其他渐近平坦时空区域揭示的新物理信息,从而为在 null 和 timelike 无穷远处考虑新可观测量打开了大门。

英文摘要:

We investigate the asymptotic symmetries of asymptotically flat spacetimes at spatial infinity. We propose a new symplectic structure and conservative boundary conditions in a polyhomogeneous Beig-Schmidt expansion. The asymptotic symmetries extend the BMS algebra by abelian sectors, notably incorporating regular log-translations and log-supertranslations. The associated charges are finite and conserved, and we show that their algebra admits a central extension between supertranslations and log-supertranslations, and between the singular translations and regular log-translations. Our analysis is compatible with, and extends, both the work of arXiv:1106.4045 and arXiv:2211.10941 : it extends the former by incorporating log-supertranslations, and the latter by allowing both parities of the log-supertranslations in the same phase space. These newly identified symmetries at spatial infinity encode novel physical information that has not been revealed in other regions of asymptotically flat spacetimes, thereby opening the door to new observables to consider at null and timelike infinity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑