title: Scale invariant dynamics of surface growth.
abstract: We describe in detail and extend a recently introduced nonperturbative renormalization group (RG) method for surface growth. The scale invariant dynamics which is the key ingredient of the calculation is obtained as the fixed point of a RG transformation relating the representation of the microscopic process at two different coarse-grained scales. We review the RG calculation for systems in the Kardar-Parisi-Zhang (KPZ) universality class and compute the roughness exponent for the strong coupling phase in dimensions from 1 to 9. Discussions of the approximations involved and possible improvements are also presented. Moreover, very strong evidence of the absence of a finite upper critical dimension for KPZ growth is presented. Finally, we apply the method to the linear Edwards-Wilkinson dynamics where we reproduce the known exact results, proving the ability of the method to capture qualitatively different behaviors.
authors.affiliation: The Abdus Salam International Centre for Theoretical Physics, P.O. Box 586, I-34100 Trieste, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Castellano
authors.forename: M
authors.initials: M
authors.lastname: Marsili
authors.forename: M A
authors.initials: MA
authors.lastname: Muñoz
authors.forename: L
authors.initials: L
authors.lastname: Pietronero