Probing the pattern of holographic thermalization with photons
Probing the pattern of holographic thermalization with photons
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DOI：
10.1007/jhep07(2013)014
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发表时间：
2013-04
影响因子：
5.4
通讯作者：
D. Steineder;S. Stricker;A. Vuorinen
中科院分区：
文献类型：
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作者：
D. Steineder;S. Stricker;A. Vuorinen
研究了全息= 4超杨-米尔斯等离子体中U（1）规范场的推迟绿色函数的行为。首先，我们使用这个量的热极限来确定光子准正规模谱远离无限t Hooft耦合极限的流动，并在此之后专门针对一个特定的全息热化模型，其中我们评估相应的谱密度。在后一种情况下，我们的主要兴趣在于谱密度接近其平衡形式的模式，以及这个过程如何取决于耦合值以及光子虚拟性。一旦耦合从λ=∞极限降低，所有得到的结果一致地指向全息热化的通常的自上而下模式的减弱。
We investigate the behavior of the retarded Green’s function of a U (1) gauge field in holographic= 4 Super Yang-Mills plasma, taking the leading strong coupling corrections into account. First, we use the thermal limit of this quantity to determine the flow of the photon quasinormal mode spectrum away from the infinite’t Hooft coupling limit, and after this specialize to a specific model of holographic thermalization, in which we evaluate the corresponding spectral density. In the latter case, our primary interest lies in the pattern, with which the spectral density approaches its equilibrium form, and how this process depends on the value of the coupling as well as the photon virtuality. All of the results obtained point consistently towards the weakening of the usual top-down pattern of holographic thermalization, once the coupling is decreased from the λ=∞ limit.