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Interface fluctuations in the two-dimensional weakly asymmetric simple exclusion process

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  • Ravishankar, Krishnamurthi

Abstract

We consider the two-dimensional weakly asymmetric simple exclusion process, where the asymmetry is along the X-axis. The generator for such a process can be written as [var epsilon]--2L0+[var epsilon]--1L[alpha], [var epsilon]>0, where L0 and L[alpha] are the generators for the nearest neighbor symmetric simple exclusion and totally asymmetric simple exclusion, respectively. We prove propagation of chaos and convergence to Burgers equation with viscosity in the limit as [var epsilon] goes to zero. The density fluctuation field converges to a generalized Ornstein-Uhlenbeck process. The covariance kernel for a class of travelling wave solutions is consistent with a phase boundary which fluctuates according to a linear stochastic partial differential equation.

Suggested Citation

  • Ravishankar, Krishnamurthi, 1992. "Interface fluctuations in the two-dimensional weakly asymmetric simple exclusion process," Stochastic Processes and their Applications, Elsevier, vol. 43(2), pages 223-247, December.
    • Handle: RePEc:eee:spapps:v:43:y:1992:i:2:p:223-247
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