论文标题
非富米系统中的动态退化分裂和定向隐形
Dynamical Degeneracy Splitting and Directional Invisibility in Non-Hermitian Systems
论文作者
论文摘要
在本文中，我们介绍了动态退化分裂的概念，以描述非富裕系统中各向异性的衰减行为。我们证明，具有动态退化性分裂的系统具有两个独特的特征：（i）系统显示频率分辨的非铁皮皮肤效应； （ii）Green的功能在给定频率下表现出异常，导致光谱功能和异常散射的不均匀。作为一种应用，我们提出了基于波数据包动力学的定向隐形性，以研究更高维度的几何依赖性皮肤效应。我们的工作阐明了非富米皮效应和绿色功能之间的忠实对应关系，为探索从这种效果中产生的新型物理现象的指导原则提供了指导原则。
In this paper, we introduce the concept of dynamical degeneracy splitting to describe the anisotropic decay behaviors in non-Hermitian systems. We demonstrate that systems with dynamical degeneracy splitting exhibit two distinctive features: (i) the system shows frequency-resolved non-Hermitian skin effect; (ii) Green's function exhibits anomalous at given frequency, leading to uneven broadening in spectral function and anomalous scattering. As an application, we propose directional invisibility based on wave packet dynamics to investigate the geometry-dependent skin effect in higher dimensions. Our work elucidates a faithful correspondence between non-Hermitian skin effect and Green's function, offering a guiding principle for exploration of novel physical phenomena emerging from this effect.
