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arXiv 0707.3601hep-th
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AdS_5中近极值黑洞的熵

Entropy of near-extremal black holes in AdS_5

Vijay Balasubramanian, Jan de Boer, Vishnu Jejjala, Joan Simon

摘要:

在对偶SU(N)Yang-Mills理论中,我们将AdS_5 x S^5中近极值黑洞的微观态构造为分布在重BPS算符中的缺陷气体。这些缺陷描述了S^5中球面D3-膜上的开弦,我们通过直接枚举它们并将结果与划分和计算进行比较,证明了它们支配着熵。我们展示了新的解耦极限,其中D-膜上最轻的开弦的场论成为黑洞几何的近视界区域的对偶。在单电荷黑洞中,我们发现了SU(N)杨-米尔斯理论之间的红外对偶性的证据,该理论用R-电荷交换了规范群的秩。在两电荷的情况下(膜对相交于一条直线上),解耦几何包括一个AdS_3因子和一个二维CFT对偶。在这个CFT中的简并解释了黑洞熵。在三电荷的情况下(三重膜相交于一点),去耦几何包含AdS_2因子。低于一定的临界质量,两个电荷系统显示裸类时奇点的解决方案,即使他们不违反BPS约束。我们建议这些奇异性的弦理论解决方案。

英文摘要:

We construct the microstates of near-extremal black holes in AdS_5 x S^5 as gases of defects distributed in heavy BPS operators in the dual SU(N) Yang-Mills theory. These defects describe open strings on spherical D3-branes in the S^5, and we show that they dominate the entropy by directly enumerating them and comparing the results with a partition sum calculation. We display new decoupling limits in which the field theory of the lightest open strings on the D-branes becomes dual to a near-horizon region of the black hole geometry. In the single-charge black hole we find evidence for an infrared duality between SU(N) Yang-Mills theories that exchanges the rank of the gauge group with an R-charge. In the two-charge case (where pairs of branes intersect on a line), the decoupled geometry includes an AdS_3 factor with a two-dimensional CFT dual. The degeneracy in this CFT accounts for the black hole entropy. In the three-charge case (where triples of branes intersect at a point), the decoupled geometry contains an AdS_2 factor. Below a certain critical mass, the two-charge system displays solutions with naked timelike singularities even though they do not violate a BPS bound. We suggest a string theoretic resolution of these singularities.

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