Figure 5
From: Su-Schrieffer-Heeger chain with one pair of \(\mathcal{P}\mathcal{T}\)-symmetric defects
The \(\mathcal{P}\mathcal{T}\)-symmetric bound states. (a) The coalesced \(\mathcal{P}\mathcal{T}\)-symmetric bound states with E = 0 for γ = 3/2. One pair of \(\mathcal{P}\mathcal{T}\)-symmetric bound states are shown for γ = 1 in (b, c). (b) \(E=2/\sqrt{5}\), (c) \(E=-{\rm{2/}}\sqrt{5}\). The upper, middle, and lower panels are the real, imaginary and the absolute values of the wave function amplitude. The square markers represent the numerical results for N = 100, the solid lines are the analytical results for N → ∞. Other parameters are m = 50, θ = 0, Δ = 1/2.
