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arXiv 1206.3735hep-thgr-qc
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简并旋转黑洞、手征CFTs和费米面I --拟正规模的解析结果

Degenerate Rotating Black Holes, Chiral CFTs and Fermi Surfaces I - Analytic Results for Quasinormal Modes

Micha Berkooz, Anna Frishman, Amir Zait

摘要:

在这项工作中,我们讨论带电旋转黑洞在$AdS_5 \times S^5$退化到极端黑洞与零熵。这些黑洞的电荷和角动量之间的标度性质类似于那些费米面运营商在$\mathcal{N}=4$ SYM的一个子扇区。我们在五维超引力理论中加入一个无质量的不带电标量,使得它仍然是IIB型十维超引力的一致截断,并分析了它的准正规模。分离的运动方程的径向和角的一部分,我们着手解决径向方程使用渐近匹配展开法适用于Heun方程与两个附近的奇点。我们使用连分式方法的角Heun方程,并获得数值结果的准正规模式。在超对称黑洞的情况下,我们给出了标量扰动衰减率的一些解析结果。所得到的准正规模谱与手征1+ 1CFT的谱相似,这与束缚场论对偶相一致。此外,一些模式可以通过分析找到。

英文摘要:

In this work we discuss charged rotating black holes in $AdS_5 \times S^5$ that degenerate to extremal black holes with zero entropy. These black holes have scaling properties between charge and angular momentum similar to those of Fermi surface operators in a subsector of $\mathcal{N}=4$ SYM. We add a massless uncharged scalar to the five dimensional supergravity theory, such that it still forms a consistent truncation of the type IIB ten dimensional supergravity and analyze its quasinormal modes. Separating the equation of motion to a radial and angular part, we proceed to solve the radial equation using the asymptotic matching expansion method applied to a Heun equation with two nearby singularities. We use the continued fraction method for the angular Heun equation and obtain numerical results for the quasinormal modes. In the case of the supersymmetric black hole we present some analytic results for the decay rates of the scalar perturbations. The spectrum of quasinormal modes obtained is similar to that of a chiral 1+1 CFT, which is consistent with the conjectured field-theoretic dual. In addition, some of the modes can be found analytically.

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