Figure 6
From: Collapse on the line – how synthetic dimensions influence nonlinear effects

Evolution of a single lattice excitation in the presence of a gap (φ0 = π/2) demonstrating nonlinearly induced localization for high input power (bottom row). The system is excited with a single pulse as shown in the (a) time domain, (b) a 3D surface plot and (c) a 2D image with normalized scaled colors. (d–f), Linear pulse spreading onto the lattice (time step m = 60, 0.3 mW input power). (g–i) Nonlinearly driven localization at a single lattice site (time step m = 60, 1 mW input power).