论文标题
扩展的BMS代数中的费用：定义和应用
Charges in the Extended BMS Algebra: Definitions and Applications
论文作者
论文摘要
这是对作者与U. Kol和R. Javadinezhad合作进行的渐近时空中对称性收费的最新作品的精选主题的评论。首先，我们重新解释了边界重力的现实约束，作为量规固定新的局部对称性，称为双重译文。这种对称性扩展了BMS组，并具有与电动力学的双重（磁性）对称性相似之处。我们使用这种新的量规对称性提出了不包含闭合时间曲线的Taub-nut空间的新描述。接下来，我们总结了通过超级译本和软重力模式通勤的Lorentz和Super-Lorentz电荷的定义的进展。
This is a review of selected topics from recent work on symmetry charges in asymptotically flat spacetime done by the author in collaboration with U. Kol and R. Javadinezhad. First we reinterpret the reality constraint on the boundary graviton as the gauge fixing of a new local symmetry, called dual supertranslations. This symmetry extends the BMS group and bears many similarities to the dual (magnetic) gauge symmetry of electrodynamics. We use this new gauge symmetry to propose a new description of the TAUB-NUT space that does not contain closed time-like curves. Next we summarize progress towards the definition of Lorentz and super-Lorentz charges that commute with supertranslations and with the soft graviton mode.
