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arXiv 2012.06562hep-thgr-qc
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极端黑洞回远

Extreme Black Hole Anabasis

Shahar Hadar, Alexandru Lupsasca, Achilleas P. Porfyriadis

摘要:

我们研究了球对称扰动的Bertotti-Robinson宇宙的$\mathsf{SL}(2)$变换性质,并确定了一个不变的$μ$,这些线性解的反作用的特点。伯克霍夫定理所允许的唯一反作用是破坏$AdS_2\times S^2$边界,并用$Q=M\sqrt{1-μ/4}$建立一个渐近平坦的Reissner-Nordström黑洞的外部。我们称这种边界条件变化的逆反应为一种再平衡现象。我们发现,除了线性的anabasis扰动Bertotti-Robinson可以被认为是一个边界条件,定义了一个连接的$AdS_2\times S^2$。连通的$AdS_2$是一个近似$AdS_2$,它的$\mathsf{SL}(2)$被适当地断开,以保持与Reissner-Nordström渐近平坦区域的连接。我们进行了一个与连接$AdS_2\times S^2$物质的反反应计算,并表明它正确地捕捉到了渐近平坦的黑洞的动态。

英文摘要:

We study the $\mathsf{SL}(2)$ transformation properties of spherically symmetric perturbations of the Bertotti-Robinson universe and identify an invariant $μ$ that characterizes the backreaction of these linear solutions. The only backreaction allowed by Birkhoff's theorem is one that destroys the $AdS_2\times S^2$ boundary and builds the exterior of an asymptotically flat Reissner-Nordström black hole with $Q=M\sqrt{1-μ/4}$. We call such backreaction with boundary condition change an anabasis. We show that the addition of linear anabasis perturbations to Bertotti-Robinson may be thought of as a boundary condition that defines a connected $AdS_2\times S^2$. The connected $AdS_2$ is a nearly-$AdS_2$ with its $\mathsf{SL}(2)$ broken appropriately for it to maintain connection to the asymptotically flat region of Reissner-Nordström. We perform a backreaction calculation with matter in the connected $AdS_2\times S^2$ and show that it correctly captures the dynamics of the asymptotically flat black hole.

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