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arXiv 1709.02812hep-th
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具有低angular momentum的微态几何的系统构造

A systematic construction of microstate geometries with low angular momentum

Iosif Bena, Pierre Heidmann, Pedro F. Ramirez

摘要:

我们概述了一个系统的程序,以获得具有相同的电荷作为三电荷五维黑洞与宏观大的视界面积和任意小的角动量的无视界微观几何形状。有两种方法可以构造这样的解:使用多中心Gibbons-Hawking(GH)空间或使用上层技术。到目前为止,只有对应于微观几何的无角动量的黑洞的解决方案已经通过superstrata获得,和多中心Gibbons-Hawking空间已被认为是只产生的微观几何的BMPV黑洞与大角动量。我们进行了彻底的搜索,在整个参数空间的光滑的无视界的解决方案与四个GH中心,发现这些有一个角动量,一般大于80%的宇宙审查约束。然而,我们发现具有三个GH中心和一个超管的解(在六维超引力中是光滑的)可以具有任意低的角动量。因此,我们的结构给出了一个配方,建立大类的微观几何形状的零角动量黑洞,而不诉诸上层技术。

英文摘要:

We outline a systematic procedure to obtain horizonless microstate geometries that have the same charges as three-charge five-dimensional black holes with a macroscopically-large horizon area and an arbitrarily-small angular momentum. There are two routes through which such solutions can be constructed: using multi-center Gibbons-Hawking (GH) spaces or using superstratum technology. So far the only solutions corresponding to microstate geometries for black holes with no angular momentum have been obtained via superstrata, and multi-center Gibbons-Hawking spaces have been believed to give rise only to microstate geometries of BMPV black holes with a large angular momentum. We perform a thorough search throughout the parameter space of smooth horizonless solutions with four GH centers and find that these have an angular momentum that is generally larger than 80% of the cosmic censorship bound. However, we find that solutions with three GH centers and one supertube (which are smooth in six-dimensional supergravity) can have an arbitrarily-low angular momentum. Our construction thus gives a recipe to build large classes of microstate geometries for zero-angular-momentum black holes without resorting to superstratum technology.

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