Aspects of the Noisy Burgers Equation

Details Aspects of the Noisy Burgers Equation Aspects of the Noisy Burgers Equation

1998-09-17

arxiv.org/abs/cond-mat/9809238v1

Physics

Condensed Matter

Statistical Mechanics

23 pages,LAMUPHYS LaTeX-file (Springer), 13 figures, and 1 table, to appear in the Proceedings of the XI Max Born Symposium on

Scientific paper

10.1007/BFb0106836

The noisy Burgers equation describing for example the growth of an interface subject to noise is one of the simplest model governing an intrinsically nonequilibrium problem. In one dimension this equation is analyzed by means of the Martin-Siggia-Rose technique. In a canonical formulation the morphology and scaling behavior are accessed by a principle of least action in the weak noise limit. The growth morphology is characterized by a dilute gas of nonlinear soliton modes with gapless dispersion law with exponent z=3/2 and a superposed gas of diffusive modes with a gap. The scaling exponents and a heuristic expression for the scaling function follow from a spectral representation.

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