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Observation of dynamic non-Hermitian skin effects

Author

Listed:
  • Zhen Li

    (Hong Kong Baptist University)

  • Li-Wei Wang

    (Soochow University
    University of Science and Technology of China
    University of Science and Technology of China)

  • Xulong Wang

    (Hong Kong Baptist University)

  • Zhi-Kang Lin

    (Soochow University)

  • Guancong Ma

    (Hong Kong Baptist University
    Hong Kong Baptist University)

  • Jian-Hua Jiang

    (Soochow University
    University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

Abstract

Non-Hermitian physics has emerged as a new paradigm that profoundly changes our understanding of non-equilibrium systems, introducing novel concepts such as exceptional points, spectral topology, and non-Hermitian skin effects (NHSEs). Most existing studies focus on non-Hermitian eigenstates, whereas dynamic properties have been discussed only recently, and the dynamic NHSEs are not yet confirmed in experiments. Here, we report the experimental observation of non-Hermitian skin dynamics using tunable one-dimensional nonreciprocal double-chain mechanical systems with glide-time symmetry. Remarkably, dynamic NHSEs are observed with various behaviors in different dynamic phases, which can be understood via the generalized Brillouin zone and the related concepts. Moreover, the observed dynamic NHSEs, amplifications, bulk unidirectional wave propagation, and boundary wave trapping provide promising ways to manipulate waves in a controllable and robust way. Our findings open a new pathway toward non-Hermitian dynamics, which will fertilize the study of non-equilibrium phases of matter.

Suggested Citation

  • Zhen Li & Li-Wei Wang & Xulong Wang & Zhi-Kang Lin & Guancong Ma & Jian-Hua Jiang, 2024. "Observation of dynamic non-Hermitian skin effects," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50776-1
    DOI: 10.1038/s41467-024-50776-1
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    References listed on IDEAS

    as
    1. Zhongming Gu & He Gao & Haoran Xue & Jensen Li & Zhongqing Su & Jie Zhu, 2022. "Transient non-Hermitian skin effect," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Deyuan Zou & Tian Chen & Wenjing He & Jiacheng Bao & Ching Hua Lee & Houjun Sun & Xiangdong Zhang, 2021. "Observation of hybrid higher-order skin-topological effect in non-Hermitian topolectrical circuits," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    3. Xiujuan Zhang & Yuan Tian & Jian-Hua Jiang & Ming-Hui Lu & Yan-Feng Chen, 2021. "Observation of higher-order non-Hermitian skin effect," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    4. Kai Wang & Avik Dutt & Charles C. Wojcik & Shanhui Fan, 2021. "Topological complex-energy braiding of non-Hermitian bands," Nature, Nature, vol. 598(7879), pages 59-64, October.
    5. Kai Zhang & Zhesen Yang & Chen Fang, 2022. "Universal non-Hermitian skin effect in two and higher dimensions," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    6. Linhu Li & Ching Hua Lee & Sen Mu & Jiangbin Gong, 2020. "Critical non-Hermitian skin effect," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    7. Li Zhang & Yihao Yang & Yong Ge & Yi-Jun Guan & Qiaolu Chen & Qinghui Yan & Fujia Chen & Rui Xi & Yuanzhen Li & Ding Jia & Shou-Qi Yuan & Hong-Xiang Sun & Hongsheng Chen & Baile Zhang, 2021. "Acoustic non-Hermitian skin effect from twisted winding topology," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
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