The Effect of Driving on Model C Interfaces

We consider the effect of uniform driving on the interface between two phases which are described by model C dynamics. The non-driven system has a classical Gaussian interface described by capillary wave theory. The model under driving retains Gaussian statistics but the interface statistics are modified by driving, notably the height fluctuations are suppressed and the correlation length of the fluctuations is increased. The model we introduce can also be used as a model for the effect of activity on interface dynamics.