Analytic AC conductivities from holography

Analytic AC conductivities from holography
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全息分析交流电导率

DOI:
10.1103/physrevd.105.066013
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发表时间:
2021-09
期刊:
影响因子:
5
通讯作者:
Wenni Zheng
Wenni Zheng
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jie Ren;Wenni Zheng

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我们找到了在任意频率ω和温度T下全息AC电导率的精确解析解,与以前的工作相比,AC电导率通常在小ω和T下解析获得。这些解使我们能够详细地研究电流-电流相关器G(ω)的解析性质。我们研究的第一个系统是具有动量耗散的AdS 5平面黑洞,其极值极限具有AdS 2因子。然后我们研究了AdS 4和AdS 5 Einstein-Einton系统,它们的特殊情况是极大规范超引力。这些解显示了极点如何移动以及分支切口如何随着温度的变化而出现。作为一个副产品,我们得到了一个R-电流相关器在一个球体上在一个有限的温度在大N和强耦合限制下,在N =4超杨-米尔斯理论。
We find exact, analytic solutions of the holographic AC conductivity at arbitrary frequency ω and temperature T, in contrast to previous works where the AC conductivity was analytically obtained usually at small ω and T. These solutions enable us to study the analyticity properties of the current-current correlator G(ω) in detail. The first system we study is the AdS5 planar black hole with momentum dissipation, whose extremal limit has an AdS2 factor. Then we study AdS4 and AdS5 Einstein-dilaton systems whose special cases are maximal gauged supergravities. The solutions show how the poles move and how branch cuts emerge as the temperature varies. As a byproduct, we obtain an R-current correlator in =4 super-Yang-Mills theory on a sphere at finite temperature in the large N and strong coupling limit.
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