拓扑(电路)
物理
相变
厄米矩阵
相(物质)
航程(航空)
统计物理学
凝聚态物理
量子电动力学
量子力学
材料科学
电气工程
工程类
复合材料
作者
Wei Wei Zhang,Qihong Cai,Li Lin,Yupeng Xu,Haipeng Yu,Wei Wang,Xiaohong Fang,Zixuan Chen,Yi‐Cai Zhang,Shengcan Ma,Chao-Fei Liu
标识
DOI:10.1016/j.rinp.2024.107758
摘要
The latest progress in the one-dimensional chain SSH model provide the basic understanding of non-Hermitian topological phases. By periodically introducing the gains and losses of imaginary potential ig,-ig,-ig,ig with anti-PT symmetry, we have investigated the topological property of non-Hermitian SSH model with long-range hopping terms. We find that the gains and losses of imaginary potential causes the model to exhibit non-Hermiticity, and the non-Hermiticity induces system to undergo topological phase transitions from topologically trivial phase with non-Hermitian winding number 0 to topologically nontrivial phase with non-Hermitian winding number 1 and −1. The introduction of gains and losses greatly broadens the topological non-trivial region and play a non-trivial role in the model. We fully characterize the topological phase transitions by the band gap closing-reopening, the non-Hermitian winding numbers v and the hidden Chern number C.
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