1. The data presented in this figure, as all the data reported in Figures 1 and 4 and in Section 3, are obtained with the continuation software AUTO. Here the wavelenght is equivalent to the domain size L of the medium in the case of direct numerical simulations under the assumption of periodic boundary conditions
2. Such a correlation function is obtained numerically by dividing the spatial domain of size L into m cells of equal size l = L/m = nΔx, where Δx is the lattice spacing equal to L/N. In each cell φ fluctuates homogeneously according to φ(x,t)=φ0[1+ηi(t)] for il≤x<(i+1)l, where the stochastic variable ηi is a temporally exponentially correlated stochastic process. The correlation length is in this case $\lambda=\frac{n}{3}\Delta x$
3. S. Alonso, F. Sagués, J.M. Sancho, Phys. Rev. E 65, 066107 (2002)
4. S. Alonso, I. Sendiña-Nadal, V. Pérez-Muñuzuri, J.M. Sancho, F. Sagués, Phys. Rev. Lett. 87, 078302 (2001)
5. J. Armero, J. Casademunt, L. Ramírez-Piscina, J.M. Sancho, Phys. Rev. E 58, 5494 (1998)