Observation of topological edge states induced solely by non-Hermiticity in an acoustic crystal

• Main Authors: Gao, He, Xue, Haoran, Wang, Qiang, Gu, Zhongming, Liu, Tuo, Zhu, Jie, Zhang, Baile
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics; Acoustic Metamaterials; Topological Insulators
• Online Access: https://hdl.handle.net/10356/154811
• Institution: Nanyang Technological University

Non-Hermiticity alters band topology in the presence of loss and/or gain in topological systems, which not only introduces new definitions in topological classifications, topological invariants, and the bulk-boundary correspondence, but also gives rise to unprecedented applications such as topologic...