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arXiv 0704.2067hep-th
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D3-brane几何的复杂边缘形变、Penrose极限和巨引力子

Complex marginal deformations of D3-brane geometries, their Penrose limits and giant gravitons

Spyros D. Avramis, Konstadinos Sfetsos, Dimitrios Zoakos

摘要:

我们将β变形规范理论的引力场的Lunin-Maldacena构造应用于一类具有U(1)^3整体对称性的IIB型背景,包括N=4超Yang-Mills的库仑支对偶的多中心D3膜背景和有限温度和化学势下理论对偶的旋转D3膜背景。在一般讨论之后,我们给出了三种特殊情况下变形度规的完整形式,它可用于研究边缘变形规范理论的各个方面。我们还构建了彭罗斯限制的解决方案的双重库仑分支沿一定的一组测地线,并由此产生的PP-波度规,我们研究的影响β-变形的巨引力子状态。我们发现巨引力子只存在于σ-形变参数的临界值以下,不与点引力子能量简并,并且保持微扰稳定。最后,我们利用威尔逊圈研究静态重夸克势,探索σ变形的多中心解。我们发现的情况下,产生完整的屏蔽以及线性约束,后者的出现是一个有趣的方式让人想起统计系统中的相变。

英文摘要:

We apply the Lunin--Maldacena construction of gravity duals to beta-deformed gauge theories to a class of Type IIB backgrounds with U(1)^3 global symmetry, which include the multicenter D3-brane backgrounds dual to the Coulomb branch of N=4 super Yang-Mills and the rotating D3-brane backgrounds dual to the theory at finite temperature and chemical potential. After a general discussion, we present the full form of the deformed metrics for three special cases, which can be used for the study of various aspects of the marginally-deformed gauge theories. We also construct the Penrose limits of the solutions dual to the Coulomb branch along a certain set of geodesics and, for the resulting PP--wave metrics, we examine the effect of beta-deformations on the giant graviton states. We find that giant gravitons exist only up to a critical value of the sigma-deformation parameter, are not degenerate in energy with the point graviton, and remain perturbatively stable. Finally, we probe the sigma-deformed multicenter solutions by examining the static heavy-quark potential by means of Wilson loops. We find situations that give rise to complete screening as well as linear confinement, with the latter arising is an intriguing way reminiscent of phase transitions in statistical systems.

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