标题： 全息多重轴子模型中的流体动力学模式 显示英文标题

标题： Hydrodynamic modes in holographic multiple-axion model

摘要： 在本文中，我们研究了具有多个轴子集的全息固体模型中的剪切粘弹性以及水动力模式，所有这些轴子都在边界上自发地破坏了平移对称性。与单轴子模型相比，在高温下剪切模量得到增强，而在存在额外轴子的情况下，剪切粘度始终被抑制。然而，在低温下，不同的轴子集在确定剪切模量方面表现出竞争关系。此外，通过计算黑洞准正则模式，发现增加更多的轴子只会增加扩散模式的数量。声学模式的数量始终保持不变。 显示英文摘要

摘要： In this paper we investigate the shear viscoelasticity and the hydrodynamic modes in a holographic solid model with several sets of axions that all break the translations spontaneously on boundary. Comparing with the single-axion model, the shear modulus is enhanced at high temperatures and the shear viscosity is always suppressed in the presence of additional axions. However, the different sets of axions exhibit competitive relationship in determining the shear modulus at low temperatures. Furthermore, by calculating the black hole quasi-normal modes, it is found that adding more axions only increases the amount of diffusive modes. The number of the sound modes always remains unchanged.