72 citations · 109 across the 13 of their papers we have counts for
4 papers · 1 filter
Braiding topology of symmetry-protected degeneracy points in non-Hermitian systems
Jia-Zheng Li, Kai Bai, Cheng Guo +4
Degeneracy points in non-Hermitian systems are of great interest. While a homotopic framework exists for understanding their behavior in the absence of symmetry, it does not apply…
Metallic Quantized Anomalous Hall Effect without Chiral Edge States
Kai-Zhi Bai, Bo Fu, Zhenyu Zhang +1
The quantum anomalous Hall effect (QAHE) is a topological state of matter with a quantized Hall resistance. It has been observed in some two-dimensional insulating materials such a…
Spin-dependent gain and loss in photonic quantum spin Hall systems
Tian-Rui Liu, Kai Bai, Jia-Zheng Li +3
Topological phases are greatly enriched by including non-Hermiticity. While most works focus on the topology of the eigenvalues and eigenstates, how topologically nontrivial non-He…
The suppression of Finite Size Effect within a Few Lattices
Tao Liu, Kai Bai, Yicheng Zhang +4
Boundary modes localized on the boundaries of a finite-size lattice experience a finite size effect (FSE) that could result in unwanted couplings, crosstalks and formation of gaps…