Dimensional fragility of the Kardar-Parisi-Zhang universality class

Abstract

We assess the dependence on substrate dimensionality of the asymptotic scaling behavior of a whole family of equations that feature the basic symmetries of the Kardar-Parisi-Zhang (KPZ) equation. Even for cases in which, as expected from universality arguments, these models display KPZ values for the critical exponents and limit distributions, their behavior deviates from KPZ scaling for increasing system dimensions. Such a fragility of KPZ universality contradicts naive expectations, and questions straightforward application of universality principles for the continuum description of experimental systems.

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• Spreading fronts of wetting liquid droplets: microscopic simulations and universal fluctuations
• The Fluctuation-Dissipation Relations: Growth, Diffusion, and Beyond
• Morphological transitions in supercritical generalized percolation and moving interfaces in media with frozen randomness