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arXiv 1702.01490hep-thgr-qc
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Gauss-Bonnet-轴子理论中的热输运和准简正模

Thermal transport and quasi-normal modes in Gauss-Bonnet-axions theory

Xiao-Mei Kuang, Jian-Pin Wu

摘要:

我们得到了任意维Gauss-Bonnet-axions(GBA)引力理论中的黑膜解。然后探讨了与该中性黑膜对偶的边界理论的导热系数。我们发现,动量耗散抑制了直流热导率,而它是由更大的GB参数增强。直流热导率的解析结果和数值结果吻合得很好。研究了动量耗散和GB耦合对交流热导率的影响,并在低频下用类Drude行为对结果进行了拟合。最后,我们解析计算了大尺度下微扰主场的准简正模频率。在足够大的有限维下,我们的分析QNM频率与数值结果吻合得很好。

英文摘要:

We obtain the black brane solution in arbitrary dimensional Gauss-Bonnet-axions (GBA) gravity theory. And then the thermal conductivity of the boundary theory dual to this neutral black brane is explored. We find that the momentum dissipation suppresses the DC thermal conductivity while it is enhanced by larger GB parameter. The analytical and numerical results of DC thermal conductivity match very well. Also we study the effect of the momentum dissipation and the GB coupling on the AC thermal conductivity and fit the results by Drude-like behavior for low frequency. Finally, we analytical compute the quasi-normal modes (QNM) frequency of the perturbative master field in large dimensions limit. Our analytical QNM frequencies agree well with the numerical results in large enough finite dimensions.

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