Braiding reflectionless states in non-Hermitian magnonics

IF 17.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Nature Physics Pub Date : 2024-11-01 DOI:10.1038/s41567-024-02667-x
Zejin Rao, Changhao Meng, Youcai Han, Liping Zhu, Kun Ding, Zhenghua An
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Abstract

A thorough understanding of the topological classifications of non-Hermitian energy bands is essential for advancing non-Hermitian band theory and its applications. As evidenced in various disciplines of physics, including optics, electronics and acoustics, the process of braiding plays a crucial role in the classification of non-Hermitian bands that manifest topological characteristics. Here we demonstrate topological braiding of both reflectionless states and resonant states in non-Hermitian magnons, unveiling a reversal in their braiding handedness. Furthermore, we constitute parity–time symmetric reflectionless scattering modes, along with their degenerate exceptional points. Our results not only underscore the importance of braided scattering states, but also establish magnonics as a versatile platform for exploring non-Hermitian band theory and developing magnon-based applications, including topological energy transfer, tunable absorbers and logic circuits.

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非赫米提磁学中的编织无反射态
透彻理解非ermitian 能带的拓扑分类对于推进非ermitian 能带理论及其应用至关重要。正如光学、电子学和声学等物理学各学科所证明的那样,编织过程在表现拓扑特性的非ermitian 能带分类中起着至关重要的作用。在这里,我们展示了非ermitian 磁子中无反射态和共振态的拓扑辫状结构,揭示了其辫状结构手性的逆转。此外,我们还提出了奇偶时对称的无反射散射模式及其退化例外点。我们的研究结果不仅强调了编织散射态的重要性,还将磁子学确立为探索非ermitian 带理论和开发基于磁子的应用(包括拓扑能量转移、可调谐吸收器和逻辑电路)的多功能平台。
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来源期刊
Nature Physics
Nature Physics 物理-物理:综合
CiteScore
30.40
自引率
2.00%
发文量
349
审稿时长
4-8 weeks
期刊介绍: Nature Physics is dedicated to publishing top-tier original research in physics with a fair and rigorous review process. It provides high visibility and access to a broad readership, maintaining high standards in copy editing and production, ensuring rapid publication, and maintaining independence from academic societies and other vested interests. The journal presents two main research paper formats: Letters and Articles. Alongside primary research, Nature Physics serves as a central source for valuable information within the physics community through Review Articles, News & Views, Research Highlights covering crucial developments across the physics literature, Commentaries, Book Reviews, and Correspondence.
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