论文标题
改进全息QCD的准模式和热化
Quasinormal modes and thermalization in Improved Holographic QCD
论文作者
论文摘要
遵循一系列相似的计算，在简单的非正式全息设置中，我们确定了在改进的全息QCD框架内的运算符对双重不变标量字段的运算符的准模式频谱。在温度高于解元过渡的临界温度时，我们发现少数明显分离的模式，然后是平行于真实轴的分支切割的结构，其存在与所采用的IHQCD电位的形式有关。最低非零模式的温度依赖性是用于研究相应相关器的热化时间的，发现在较高温度下，该相应相关器的温度依赖性在相位过渡附近的临界温度的顺序略有降低，并且比$ 1/t的降低略快。
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.
