论文标题
非热拓扑状态的异常特征
Anomalous features of non-Hermitian topological states
论文作者
论文摘要
众所周知，非热式系统中的拓扑状态表现出一些异常特征。在这里，我们发现了非铁拓扑状态的两个新的异常特征。我们考虑使用一个维度的非肾小球哈密顿量，并表明由于非铁皮皮肤效应而导致的非热质系统中拓扑特征状态的线性组合实际上可能会损失拓扑鲁棒性。我们考虑了二维非高级Chern绝缘子，并表明拓扑状态的手性在汉密尔顿的某些参数上可能会破坏。这意味着拓扑状态不再对2D中的反向散射免疫。
Topological states in non-Hermitian systems are known to exhibit some anomalous features. Here, we find two new anomalous features of non-Hermitian topological states. We consider a one dimensional nonreciprocal Hamiltonian and show that topological robustness can be practically lost for a linear combination of topological eigenstates in non-Hermitian systems due to the non-Hermitian skin effect. We consider a two dimensional non-Hermitian Chern insulator and show that chirality of topological states can be broken at some parameters of the Hamiltonan. This implies that the topological states are no longer immune to backscattering in 2D.
