论文标题
全息流体中的横向金石模式，翻译损坏
Transverse Goldstone mode in holographic fluids with broken translations
论文作者
论文摘要
在本文中，我们研究了通过特定全息模型自发折断翻译的流体系统中的低能剪切模式。在没有动量松弛的情况下，我们发现横向通道中存在两个脱钩的无间隙模式，其中一个模式纯粹是扩散的，另一种是对涡流如激发的对应。扩散模式与动量的保护相关联，涡流模式可以看作是自发对称性断裂的金石模式。打开外部源，明确但微弱地打破了翻译，可能会放松并获得微小的质量差距。最后，在强大的动量松弛方案中，我们发现了一个（伪 - ）扩散到隔离的交叉，该分频器是由动量缝隙设定的。
In this paper we investigate the low energy shear modes in fluid systems with spontaneously broken translations by a specific holographic model. In absence of momentum relaxation, we find that there exist two decoupled gapless modes in the transverse channel, one of which is purely diffusive and the other corresponds to vortex like excitations. The diffusive mode is associated with the conservation of momentum and the vortex mode can be viewed as the Goldstone mode of the spontaneous symmetry breaking. Switching on an external source which breaks the translations explicitly but weakly, the would-be gapless modes both get relaxed and acquire a tiny mass gap. Finally, in the strong momentum relaxation regime, we find a (pseudo-)diffusive-to-sound crossover that is set by a momentum gap.
