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arXiv 2002.09544hep-phhep-th
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改进全息QCD中的准正规模和热化

Quasinormal modes and thermalization in Improved Holographic QCD

Timo Alho, Jere Remes, Kimmo Tuominen, Aleksi Vuorinen

摘要:

在简单的非共形全息装置中进行了一系列类似的计算之后,我们在改进的全息QCD框架内确定了与规范不变标量场对偶的算符的准正规模谱。在温度略高于解除禁闭转变的临界温度,我们发现一个小数目的明确分离的模式,其次是一个分支切割状结构平行于实轴,其存在是链接到形式的IHQCD潜力。最低的非零模式的温度依赖性进一步被用来研究相应的相关器的热化时间,这被发现是在相变附近的逆临界温度的顺序和下降略快于$1/T$在较高的温度。

英文摘要:

Following a series of similar calculations in simpler non-conformal holographic setups, we determine the quasinormal mode spectrum for an operator dual to a gauge-invariant scalar field within the Improved Holographic QCD framework. At temperatures somewhat above the critical temperature of the deconfinement transition, we find a small number of clearly separated modes followed by a branch-cut-like structure parallel to the real axis, the presence of which is linked to the form of the IHQCD potential employed. The temperature dependence of the lowest nonzero mode is furthermore used to study the thermalization time of the corresponding correlator, which is found to be of the order of the inverse critical temperature near the phase transition and decrease slightly faster than $1/T$ at higher temperatures.

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