3 papers
quant-ph2026
Point-gap topology in amorphous non-Hermitian quantum systems
Xue-Min Yang, Deng-Feng Li, Mu Zhou +7
Recent studies have revealed that not only does the correspondence between spectral winding numbers and skin modes break down in non-Hermitian systems, but the energy spectrum itse…
quant-ph2026
Non-Hermitian second-order topological insulator with point gap
Xue-Min Yang, Hao Lin, Jian Li +3
The zero-mode corner states in the gap of two-dimensional non-Hermitian Su-Schrieffer-Heeger model are robust to infinitesimal perturbations that preserve chiral symmetry. However,…
cond-mat.mes-hall2025
Floquet composite Dirac semimetals
Hong Wu, Jia-Ji Zhu, Jian Li +3
Dirac semimetals can be classified into types I, II, and III based on the topological charge of their Dirac points. If a three-dimensional (3D) system can be sliced into a family o…