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arXiv 1508.04079hep-thgr-qc
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三维黑洞的几何微观态

Geometric Microstates for the Three Dimensional Black Hole?

Alexander Maloney

摘要:

研究了三维黑洞的微观态,这些微观态是通过量子化事件视界后的拓扑非平凡几何得到的。在手征引力中,这些态是通过量子化加边黎曼曲面的模空间得到的。在半经典极限下,这些微观态可以在穿孔黎曼曲面的模空间上用相交理论计算。我们做一个猜想(支持数值)的渐近行为的相关交叉数。结果是,具有固定拓扑结构的几何微观态的熵增长太慢,无法解释半经典的贝肯斯坦-霍金熵。然而,拓扑结构的总和会导致分歧。最后,我们对如何解决这一问题以给出与视界面积成正比的熵进行了一些推测。

英文摘要:

We study microstates of the three dimensional black hole obtained by quantizing topologically non-trivial geometries behind the event horizon. In chiral gravity these states are found by quantizing the moduli space of bordered Riemann surfaces. In the semi-classical limit these microstates can be counted using intersection theory on the moduli space of punctured Riemann surfaces. We make a conjecture (supported by numerics) for the asymptotic behaviour of the relevant intersection numbers. The result is that the geometric microstates with fixed topology have an entropy which grows too slowly to account for the semiclassical Bekenstein-Hawking entropy. The sum over topologies, however, leads to a divergence. We conclude with some speculations about how this might be resolved to give an entropy proportional to horizon area.

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