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arXiv 2007.08422hep-thgr-qc
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AdS中的视界对称性和多毛黑洞

Horizon symmetries and hairy black holes in AdS

Laura Donnay, Gaston Giribet, Julio Oliva

摘要:

我们调查是否超平移对称性可能会出现在一个场景中,涉及黑洞在AdS空间。我们考虑的框架是大质量的三维引力,它允许一个丰富的黑洞相空间,包括静止的AdS黑洞与柔软的衰变头发。我们考虑一组渐近条件,允许这种衰减的边界附近,并且,除了本地共形对称性,是由一个额外的本地电流保存。相应的同构代数由两个维拉索罗代数的半直和无限维阿贝尔理想组成。然后,我们将分析重新定位到近视界区域,在那里也出现了无限维对称性。在视界的超平移对称性产生了一组无限的非平凡的费用,我们明确计算。这些电荷的零模正确地再现了黑洞熵。与爱因斯坦引力相反,在高阶导数理论中,近视界展开中的次超前项对近视界电荷有贡献。这些项恰好捕获了对贝肯斯坦面积定律的高曲率修正。

英文摘要:

We investigate whether supertranslation symmetry may appear in a scenario that involves black holes in AdS space. The framework we consider is massive 3D gravity, which admits a rich black hole phase space, including stationary AdS black holes with softly decaying hair. We consider a set of asymptotic conditions that permits such decaying near the boundary, and which, in addition to the local conformal symmetry, is preserved by an extra local current. The corresponding algebra of diffeomorphisms consists of two copies of Virasoro algebra in semi-direct sum with an infinite-dimensional Abelian ideal. We then reorient the analysis to the near horizon region, where infinite-dimensional symmetries also appear. The supertranslation symmetry at the horizon yields an infinite set of non-trivial charges, which we explicitly compute. The zero-mode of these charges correctly reproduces the black hole entropy. In contrast to Einstein gravity, in the higher-derivative theory subleading terms in the near horizon expansion contribute to the near horizon charges. Such terms happen to capture the higher-curvature corrections to the Bekenstein area law.

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