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arXiv 1001.0779hep-th
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剪切模、临界性与极值黑洞

Shear Modes, Criticality and Extremal Black Holes

Mohammad Edalati, Juan I. Jottar, Robert G. Leigh

摘要:

考虑(2+1)维场论,假设它与极值Reissner-Nordstrom AdS(4)黑洞背景全息对偶,计算了有限动量和频率下的电荷(矢量)流和能量动量(张量)算符的延迟子.我们发现,类似于以前观察到的标量和旋量算子的标量,这些标量在低频表现出涌现标度行为。我们数值计算了极端Reissner-Nordstrom AdS(4)黑洞的电磁和引力准正规频率(在剪切通道中),对应于延迟子的极点谱.出现的图像是相当简单的:有一个分支沿负虚频轴切割,和一系列孤立的极点对应阻尼激励。所有这些极点总是在下半复频率平面中,指示稳定性。我们表明,这种解析结构可以被理解为适当的限制有限温度的结果,T取为零,保持化学势固定。

英文摘要:

We consider a (2+1)-dimensional field theory, assumed to be holographically dual to the extremal Reissner-Nordstrom AdS(4) black hole background, and calculate the retarded correlators of charge (vector) current and energy-momentum (tensor) operators at finite momentum and frequency. We show that, similar to what was observed previously for the correlators of scalar and spinor operators, these correlators exhibit emergent scaling behavior at low frequency. We numerically compute the electromagnetic and gravitational quasinormal frequencies (in the shear channel) of the extremal Reissner-Nordstrom AdS(4) black hole corresponding to the spectrum of poles in the retarded correlators. The picture that emerges is quite simple: there is a branch cut along the negative imaginary frequency axis, and a series of isolated poles corresponding to damped excitations. All of these poles are always in the lower half complex frequency plane, indicating stability. We show that this analytic structure can be understood as the proper limit of finite temperature results as T is taken to zero holding the chemical potential fixed.

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