2017年8月
BMS supertranslations and memory in four and higher dimensions
CLASSICAL AND QUANTUM GRAVITY
- ,
- ,
- 巻
- 34
- 号
- 15
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/1361-6382/aa777a
- 出版者・発行元
- IOP PUBLISHING LTD
We consider the memory effect in even dimensional spacetimes of dimension d >= 4 arising from a burst of gravitational radiation. When d = 4, the natural frames in the stationary eras before and after the burst differ by the composition of a boost and supertranslation, and this supertranslation characterizes the 'memory effect', i.e. the permanent displacement of test particles near infinity produced by the radiation burst. However, we show that when d > 4, this supertranslation and the corresponding memory effect vanish. Consequently, when d > 4, it is natural to impose stronger asymptotic conditions at null infinity that reduce the asymptotic symmetry group to the Poincare group. Conversely, when d = 4, the asymptotic symmetry group at null infinity must be taken to be the BMS group.
- リンク情報
- ID情報
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- DOI : 10.1088/1361-6382/aa777a
- ISSN : 0264-9381
- eISSN : 1361-6382
- Web of Science ID : WOS:000404881700005