论文标题
非官员基塔夫链中的Majorana零模式有缺陷
Defective Majorana zero modes in non-Hermitian Kitaev chain
论文作者
论文摘要
拓扑稳定性是拓扑材料的重要特性。但是，非热效应可能会改变这种情况。在这里，我们调查了边缘状态在非弱者Kitaev链中具有不平衡的隧道术语和超导配对项的鲁棒性。通过定义Majorana零模式（MZM）和磁因子的相似性，提供了MZM的合并相图和相应的自旋极化相图。由于sublattice对称性和粒子孔对称性的崩溃引起的非热合并效应和非热抑制作用，系统出现非常有趣的现象，例如有缺陷的MZM，数字无反对的块状 - 结合对应关系，许多体现的磁场状态，磁相交叉的磁相交。那些新颖的非热效果为MZM和拓扑物理学提供了新的见解。
Topological stability is an important property for topological materials. However, the non-Hermitian effects may change this situation. Here, we investigate the robustness of edge states in the non-Hermitian Kitaev chain with imbalanced tunneling term and superconducting pairing term. By defining the similarity of Majorana zero modes (MZMs) and magnetic factor, the coalescing phase diagram of the MZMs and corresponding spin polarization phase diagram are provided. Because of the non-Hermitian coalescence effect and non-Hermitian suppression effect induced by the breakdown of sublattice symmetry and particle-hole symmetry, the system emergence very interesting phenomenons, such as defective MZMs, number-anomalous bulk-boundary correspondence, coalescing of many-body ground states, the magnetic phase crossover without gap closing. Those novel non-Hermitian effects offer fresh insights into MZMs and topological physics.
