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29 March 2024
 
  » arxiv » cond-mat/0606315

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Asymptotic and effective coarsening exponents in surface growth models
Paolo Politi ; Alessandro Torcini ;
Date 13 Jun 2006
Subject Statistical Mechanics
AbstractWe consider a class of unstable surface growth models, z_t = -partial_x J, developing a mound structure of size lambda and displaying a perpetual coarsening process, i.e. an endless time increasing of lambda. The coarsening exponents n, defined by the growth law of the mound size lambda with time, lambda=t^n, were previously found by numerical integration of the growth equations [A. Torcini and P. Politi, Eur. Phys. J. B 25, 519 (2002)]. Recent analytical work now allows to interpret such findings as finite time effective exponents. The asymptotic exponents are shown to appear at so large time that cannot be reached by direct integration of the growth equations. The reason for the appearance of effective exponents is clearly identified.
Source arXiv, cond-mat/0606315
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