论文标题
非热门拓扑现象：评论
Non-Hermitian topological phenomena: A review
论文作者
论文摘要
过去几十年来，对拓扑材料产生了兴趣，并且在凝结物理学中引入了许多数学概念。其中，宽大的对应关系是拓扑物理学中的核心主题，它激发了研究人员专注于边界物理学。最近，拓扑阶段的概念已扩展到非富米顿人，其特征值可能很复杂。除拓扑外，非热性还可能导致一种称为非铁皮皮肤效应的边界现象，这是光谱对边界条件的极端敏感性。在本文中，我们通过主要关注边界问题来审查非热拓扑物理学的发展。除了非热和拓扑边界现象之间的竞争外，我们还讨论了非热性本身固有的拓扑性质。
The past decades have witnessed an explosion of interest in topological materials, and a lot of mathematical concepts have been introduced in condensed matter physics. Among them, the bulk-boundary correspondence is the central topic in topological physics, which has inspired researchers to focus on boundary physics. Recently, the concepts of topological phases have been extended to non-Hermitian Hamiltonians, whose eigenvalues can be complex. Besides the topology, non-Hermiticity can also cause a boundary phenomenon called the non-Hermitian skin effect, which is an extreme sensitivity of the spectrum to the boundary condition. In this article, we review developments in non-Hermitian topological physics by focusing mainly on the boundary problem. As well as the competition between non-Hermitian and topological boundary phenomena, we discuss the topological nature inherent in non-Hermiticity itself.
