Noise induced transition is an unexpected phenomena leading to the appearance of equilibrium states. Localized patterns are the most studied localized structures. When noise is added the patterns propagate or shrink over the homogeneous state, that is, noise induces the propagation of fronts giving rise to the appearance of patterns. Close to spatial bifurcation, below the threshold, noise induces the appearance of localized structures.

This current project proposes to understand the mechanism behind the propagation induced by noise and noise sustain localized structures close to a spatial bifurcation. We shall study experimentally this robust phenomenon, in particular, in a valve of liquid crystal with optical feedback and in a Newtonian fluid forced with two resonant frequencies (Faraday instability).

People involved
Marcel G Clerc (University of Chile)
Nicolas Mujica (University of Chile)
Stefania Residori (Institut non lineaire de Nice)
Enrique Tirapegui (University of Chile)