Numerical study of a model for interface growth

Abstract
We present the first numerical study of the nonlinear stochastic differential equation characterizing interface growth, originally proposed by Kardar, Parisi, and Zhang [Phys. Rev. Lett. 56, 889 (1986)]. Our studies are carried out in two dimensions which would correspond to three-dimensional studies of microscopic models such as the Eden or ballistic-deposition models. We find that the interface width satisfies the proposed scaling relations. The exponents associated with this scaling relation are calculated for different strengths of the effective coupling in the model and seem to be different from previous calculations on microscopic models.