Spin-Selective Topological Effects without Encircling Exceptional Points

Author(s): Shun Wan, Yuze Hu, Ran Huang, Shiru Song, Hui Yang, Weibao He, Siyang Hu, Ziheng Ren, Zhongyi Yu, Yunlan Zuo, Yulong Zhang, Dongsheng Yang, Xiang’ai Cheng, Franco Nori, Hui Jing, and Tian Jiang Exceptional points (EPs), namely non-Hermitian spectral singularities, enable unconventional light-matter interactions, leading to intriguing phenomena, such as chiral mode transfer, state flip, and chiral phase accumulation. Yet considerable previous EP effects in topological photonics based on a s… [Phys. Rev. Lett. 136, 053801] Published Tue Feb 03, 2026