Special modes induced by inter-chain coupling in a non-Hermitian ladder system |
Rong Huang,Yu Yan,Zhi-Xu Zhang,Lu Qi,Hong-Fu Wang,Shou Zhang |
Figure 11. Spectra under the OBC. In (a) and (d), γ = 0.2; in (b) and (e), γ = 0.65; in (c) and (f), γ = 3. The other parameters are Δ = 2/3, t1 = 1, and N = 22. N is the number of lattice sites of one chain. The special modes with $| E| =\gamma $ are marked with prismatic pink. |