Pinning by noise

S. E. MANGIONI; R. R. DEZA

Viñas del Mar

Congreso; XIVth International Workshop on Instabilities and Nonequilibrium Structures; 2013

By effect of aggregating currents, some systems display aneffective diffusion coefficient that becomes negative in arange of the order parameter, giving rise to bistabilityamong homogeneous states (HS). By applying a proper multiplicative noise, localized(pinning) states are shown to become stable at theexpense of one of the HS. They are however not static, but their location fluctuateswith a variance that increases with the noise intensity. The numerical results are supported by an analyticalestimate in the spirit of the so-called ?solvability condition?.