论文标题
QCD临界点附近密度波动的动力光谱结构
Dynamical spectral structure of density fluctuation near QCD critical point
论文作者
论文摘要
在以色列 - 斯图尔特相对论粘性水动力学的范围内，使用线性响应理论得出了QCD临界点附近密度波动的动力光谱结构的表达。已经研究了系统向临界终点移动时的光谱结构的变化。临界点的效果通过现实的状态方程以及各种传输系数和热力学响应函数的缩放行为引入了临界点的效果。我们发现，当系统远离临界点时，布里渊和瑞利峰在临界点附近合并时明显可见。已经证明了声波的波矢量（$ k $）的光谱函数的结构的敏感性。已经表明，由于临界点附近的声波吸收，布里渊峰与雷利峰合并。
The expression for the dynamical spectral structure of the density fluctuation near the QCD critical point has been derived using linear response theory within the purview of Israel-Stewart relativistic viscous hydrodynamics. The change in spectral structure of the system as it moves toward critical end point has been studied. The effects of the critical point have been introduced in the system through a realistic equation of state and the scaling behaviour of various transport coefficients and thermodynamic response functions. We have found that the Brillouin and the Rayleigh peaks are distinctly visible when the system is away from critical point but the peaks tend to merge near the critical point. The sensitivity of structure of the spectral function on wave vector ($k$) of the sound wave has been demonstrated. It has been shown that the Brillouin peaks get merged with the Rayleigh peak because of the absorption of sound waves in the vicinity of the critical point.
