Universality classes in anisotropic non-equilibrium growth models

Abstract

We study the effect of generic spatial anisotropies on the scaling behavior in the Kardar-Parisi-Zhang equation. In contrast to its "conserved" variants, anisotropic perturbations are found to be relevant in d > 2 dimensions, leading to rich phenomena that include novel universality classes and the possibility of first-order phase transitions and multicritical behavior. These results question the presumed scaling universality in the strong-coupling rough phase, and shed further light on the connection with generalized driven diffusive systems.

4 pages, revtex, 2 figures (eps files enclosed)

References in corpus (3)

• Internal Fluctuations Effects on Fisher Waves
• The effects of violating detailed balance on critical dynamics
• The universality class of fluctuating pulled fronts

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