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arXiv 1906.09083hep-thgr-qc
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脱离极端克尔的近视界

Breaking away from the near horizon of extreme Kerr

Alejandra Castro, Victor Godet

摘要:

研究了(近)极端Kerr黑洞的近视界几何中的引力扰动.通过考虑度规涨落的一致截断,我们得到了线性化爱因斯坦方程的一个解。的动力学是由两个主字段,在上下文中的nAdS $_2$ /nCFT $_1$对应,都是不相关的运营商的共形尺寸$Δ=2$。这些场通过破坏近视界区域的共形对称性来控制对极值的偏离。其中一个主场与近视界的大类质同构有关,其运动方程与史瓦西有效作用量相容。另一个领域是必不可少的一致性描述的几何远离地平线。

英文摘要:

We study gravitational perturbations around the near horizon geometry of the (near) extreme Kerr black hole. By considering a consistent truncation for the metric fluctuations, we obtain a solution to the linearized Einstein equations. The dynamics is governed by two master fields which, in the context of the nAdS$_2$/nCFT$_1$ correspondence, are both irrelevant operators of conformal dimension $Δ=2$. These fields control the departure from extremality by breaking the conformal symmetry of the near horizon region. One of the master fields is tied to large diffeomorphisms of the near horizon, with its equations of motion compatible with a Schwarzian effective action. The other field is essential for a consistent description of the geometry away from the horizon.

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