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arXiv 1702.04353hep-th
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ABJM中的极化黑洞

Polarised Black Holes in ABJM

Miguel S. Costa, Lauren Greenspan, Joao Penedones, Jorge E. Santos

摘要:

我们用数值方法构造了Einstein-Maxwell-Maxwell理论的渐近$AdS_4$解。它们具有在共形边界$S^2\times \mathbb{R}_t$处打开的偶极静电势。我们发现两类几何形状:$AdS$孤子解决方案,编码的$AdS$几何没有地平线上的电场的完全反作用,和中性的黑洞是“极化”的偶极电位。对于一定的电场范围$\mathcal{E}$,我们发现了两个不同的分支的$AdS$孤子存在相同的值$\mathcal{E}$。对于黑洞,我们发现两个或四个分支取决于电场和视界温度的值。这些分支在电场的临界值处相遇,并施加了应该在双场论中反映的最大值$\mathcal{E}$。对于孤子和黑洞的几何形状,我们研究边界数据,如应力张量。对于黑洞,我们还考虑了视界观测量,如熵。在有限温度下,我们考虑了两相的吉布斯自由能,并确定了它们之间的相变。我们发现,$AdS$孤子在低温下占主导地位的电场的最大值。利用规范/引力对偶,我们提出这些解决方案是对偶变形ABJM理论和计算相应的弱耦合相图。

英文摘要:

We numerically construct asymptotically $AdS_4$ solutions to Einstein-Maxwell-dilaton theory. These have a dipolar electrostatic potential turned on at the conformal boundary $S^2\times \mathbb{R}_t$. We find two classes of geometries: $AdS$ soliton solutions that encode the full backreaction of the electric field on the $AdS$ geometry without a horizon, and neutral black holes that are "polarised" by the dipolar potential. For a certain range of the electric field $\mathcal{E}$, we find two distinct branches of the $AdS$ soliton that exist for the same value of $\mathcal{E}$. For the black hole, we find either two or four branches depending on the value of the electric field and horizon temperature. These branches meet at critical values of the electric field and impose a maximum value of $\mathcal{E}$ that should be reflected in the dual field theory. For both the soliton and black hole geometries, we study boundary data such as the stress tensor. For the black hole, we also consider horizon observables such as the entropy. At finite temperature, we consider the Gibbs free energy for both phases and determine the phase transition between them. We find that the $AdS$ soliton dominates at low temperature for an electric field up to the maximum value. Using the gauge/gravity duality, we propose that these solutions are dual to deformed ABJM theory and compute the corresponding weak coupling phase diagram.

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