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arXiv 0711.0133hep-th
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自由费米子与热AdS/CFT

Free Fermions and Thermal AdS/CFT

Suvankar Dutta, Rajesh Gopakumar

摘要:

$S^3$上有限温度U(N)规范理论的动力学在弱耦合下可用有效的么正矩阵模型来描述。在这里,我们提出了一个精确的解决方案,这些模型,对于任何值的$N$,在一个总和表示。取该解的大$N$极限提供了一个新的视角,该视角被认为是Hawking-Page跃迁的对偶。大的$N$相变在这里以类似于2d Yang-Mills理论中的Douglas-Kazakov相变的方式表现出来。我们进行了一个完整的分析鞍表示在最简单的情况下,只涉及序参量${\rm Tr}U$。我们发现热$AdS$、小黑洞和大黑洞对应的鞍点都可以用自由费米子来描述。它们都承认一个简单的相空间描述{ \it a} Lin,Lunin和Maldacena的BPS几何。

英文摘要:

The dynamics of finite temperature U(N) gauge theories on $S^3$ can be described, at weak coupling, by an effective unitary matrix model. Here we present an exact solution to these models, for any value of $N$, in terms of a sum over representations. Taking the large $N$ limit of this solution provides a new perspective on the deconfinement transition which is supposed to be dual to the Hawking-Page transition. The large $N$ phase transition manifests itself here in a manner similar to the Douglas-Kazakov phase transition in 2d Yang-Mills theory. We carry out a complete analysis of the saddle representation in the simplest case involving only the order parameter ${\rm Tr}U$. We find that the saddle points corresponding to thermal $AdS$, the small black hole and the large black hole can all be described in terms of free fermions. They all admit a simple phase space description {\it a la} the BPS geometries of Lin, Lunin and Maldacena.

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