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arXiv 2109.06642gr-qchep-th
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关于空间无穷远的对称性和电荷

On symmetries and charges at spatial infinity

L. Brocki, J. Kowalski-Glikman

摘要:

继Henneaux和Troessaert最近的工作,这重新审视的时空对称性问题在空间无穷大,我们分析这个问题使用的邦迪度规作为我们的出发点,没有行列式条件。事实证明,在这种情况下,空间无穷远的对称性形成了附加了无限阿贝尔对称性的BMS对称性。此外,我们发现,强加的决定性条件的邦迪度规将导致急剧减少的对称性,没有空间(超)平移。

英文摘要:

Following the recent work of Henneaux and Troessaert, which revisits the problem of spacetime symmetries at spatial infinity, we analyze this problem using the Bondi metric without determinant condition as our starting point. It turns out that in this case the symmetries at spatial infinity form the BMS symmetry appended with an additional infinite set of abelian symmetries. We furthermore find that imposing the determinant condition to the Bondi metric would result in a drastic reduction of symmetries, with no spatial (super) translations present.

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