Dynamic Scaling of Coupled Nonequilibrium Interfaces

Details Dynamic Scaling of Coupled Nonequilibrium Interfaces Dynamic Scaling of Coupled Nonequilibrium Interfaces

1992-08-15

arxiv.org/abs/cond-mat/9208010v1

Physics

Condensed Matter

13 pages (REVTEX) + 4 figures upon request: alb@buphy.bu.edu

Scientific paper

10.1103/PhysRevA.46.R2977

We propose a simple discrete model to study the nonequilibrium fluctuations of two locally coupled 1+1 dimensional systems (interfaces). Measuring numerically the tilt-dependent velocity we construct a set of stochastic continuum equations describing the fluctuations in the model The scaling predicted by the equations are studied analytically using dynamic renormalization group and compared with simulation results. When the coupling is symmetric, the well known KPZ exponents are recovered. If one of the systems is fluctuating independently, an increase in the roughness exponent is observed for the other one.

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