Anisotropic model of kinetic roughening: the strong-coupling regime.
We study the strong coupling (SC) limit of the anisotropic Kardar-Parisi-Zhang (KPZ) model. A systematic mapping of the continuum model to its lattice equivalent shows that in the SC limit, anisotropic perturbations destroy all spatial correlations but retain a temporal scaling which shows a remarkable crossover along one of the two spatial directions, the choice of direction depending on the relative strength of anisotropicity. The results agree with exact numerics and are expected to settle the long-standing SC problem of a KPZ model in the infinite range limit.
Chattopadhyay
Amit K
AK
Department of Theoretical Physics, Hahn-Meitner Institute, Glienicker Strasse 100, 14109 Berlin, Germany. A.Chattopadhyay@ed.ac.uk