Figure 2: The dispersion relation of pure edge modes for points (a) and (b) in Fig. 1 computed using the circular pseudo-field Eq. (6) with κ = 0.3 and (a) ρ = 0.4; (b) ρ = 1. Panel (c) is computed using the Lissajous pseudo-field Eq. (5) with κ = λ = 0.3, D1 = 2, D2 = 1, φ = π/2, and ρ = 1. The number of lattice sites is 40 and the small parameter is ǫ = 2π/60. The blue curve represents pure edge modes computed numerically from Eqs. (12–13). The black curve shows the asymptotic prediction Eq. (24).
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