FLUCTUATIONS OF A FLUX DRIVEN INTERFACE

We investigate a low temperature lattice gas with short range attracti ve forces. Boundary chemical potentials are imposed in such a way that a sharp interface separates low and high density domains and such tha t there is a constant mass flux perpendicular to this interface. From a continuum theory (fluctuating hydrodynamics) we determine the interf ace fluctuations in this nonequilibrium steady state. They turn out to be reduced as compared to thermal equilibrium.