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cond-mat.mes-hall2026
Anomalous Collision of Exceptional Points on Nonorientable Manifolds
Weijia Wang, Qicheng Zhang, Kun Zhang +2
Band degeneracies, ranging from Hermitian Dirac points to non-Hermitian exceptional points (EPs), play a central role in topological phase transitions. Beyond the topology of indiv…
cond-mat.mes-hall2025
Observation of anomalous Floquet non-Abelian topological insulators
Huahui Qiu, Shuaishuai Tong, Qicheng Zhang +2
Non-Abelian topological phases, which go beyond traditional Abelian topological band theory, are garnering increasing attention. This is further spurred by periodic driving, leadin…