ZigZag Instability - Swift-Hohenberg Equation

Stripes + Random Perturbation

This demonstration simulates the Swift-Hohenberg equation for an initial state of stripes with wave number 0.88357 that is zigzag unstable, together with a small random perturbation.

Try different values of eps, e.g. eps=0.15, and investigate the behavior in the Fourier plot as well.