Figure 1
From: Extended stable equilibrium invaded by an unstable state
Front propagation between a stable and an unstable state. (a) Front propagation into unstable state, V(u) = −u2/2 + u3/3 and ζ = 0. A = 0 and B = 1 are unstable and stable state, respectively. The speed of propagation v = 2. (b) Front propagation from unstable state, V(u) = u6/6 − 0.7u5/5 − u4/4 + 0.7u3/3 and ζ = 0. A = 0, B = 1, C = −1, and D = 0.7, where B and C are stable state, D is an unstable state and A is a half stable equilibrium [15]. Left panels account for the respective potential. Right panels stand for the spatiotemporal evolution and profile of the fronts.
