论文标题
PT对称拓扑接近零接口状态
PT-symmetric topological near-zero interface state
论文作者
论文摘要
具有平等时间（PT）对称性和拓扑的光子系统引起了相当大的关注。在这项工作中，在PT-对称光子晶格中研究了近距离的边缘状态，结果表明，尽管不间断的PT对称性，但近零边缘状态仍可以自发折断。为了达到稳定的拓扑接近零模式，提出了带有精心设计的PT对称的二元格。进一步的研究表明，这种结构支持稳定的拓扑界面体验的相位过渡，类似于无限晶格中的散装状态，因此即使有不间断的PT相，也具有现实价值。我们的研究丰富了非铁质拓扑物理学的含量，并且可能在拓扑激光和量子计算领域中具有潜在的应用。
Photonic systems with parity-time (PT) symmetry and topology are attracting considerable attentions. In this work, topological near-zero edge states are studied in PT-symmetric photonic lattice and the results indicate that the near-zero edge states can be broken spontaneously in spite of the unbroken PT symmetry. To achieve the stable topological near-zero mode, a binary lattice with carefully designed PT-symmetric is proposed. Further study shows such a structure supports a stable topological interface state experiences phase transition similar to the bulk states in infinite lattice and thus possess real-eigenvalues even with unbroken PT phase. Our study enriches the content of non-Hermitian topological physics and might have potential applications in the fields of topological lasing and quantum computation.
