论文标题
拓扑D级物理具有被动声学元素
Topological D-Class Physics with Passive Acoustic Elements
论文作者
论文摘要
在这项工作中，我们提供了一种工程解决方案，该解决方案为用被动声学晶体的完整拓扑绝缘子的实施铺平了道路。例如，我们设计了一种声学晶体，该声学晶体显示了D类拓扑绝缘子的全部特性，例如非平凡的Chern数字和用于散装和边缘动力学的精确粒子孔对称性。关键是声学谐振器的特定几何形状，可促进大量独立和等强度的耦合，八个是确切的，因此模式耦合理论仍然准确。后者使我们能够以高忠诚度实施，以前在[Barlas等人，PRB（2018）]中宣布的，从2级中产生了D类D级拓扑阶段的脱层紧密结合模型。从D类成功实现了拓扑声学晶体，以观察到通过Pi-Fluxes稳定的Majorana样模式的方式。
In this work, we supply an engineering solution that paves the way to the implementation of the full classification table of topological insulators with passive acoustic crystals. As an example, we design an acoustic crystal displaying the full range of characteristics of a topological insulator from class D, such as non-trivial Chern numbers and an exact particle-hole symmetry for both bulk and edge dynamics. The key is a particular geometry of the acoustic resonators that facilitates a large number of independent and equal-strength couplings, eight to be precise, such that the mode-coupling theory remains accurate. The latter enables us to implement with high fidelity the de-complexified tight-binding model generating the topological phases from class D in 2-dimensions, previously announced in [Barlas et al, PRB (2018)]. The successful realization of a topological acoustic crystal from class D paves the way to the observation of the Majorana-like modes stabilized by pi-fluxes.
