Dynamical Renormalization Group Study for a Class of Non-local Interface Equations

Details Dynamical Renormalization Group Study for a Class of Non-local Interface Equations Dynamical Renormalization Group Study for a Class of Non-local Interface Equations

2011-10-03

arxiv.org/abs/1110.0431v1

Physics

Condensed Matter

Statistical Mechanics

34 pages, 9 figures. Journal of Statistical Mechanics: Theory and Experiments (in press)

Scientific paper

We provide a detailed Dynamic Renormalization Group study for a class of stochastic equations that describe non-conserved interface growth mediated by non-local interactions. We consider explicitly both the morphologically stable case, and the less studied case in which pattern formation occurs, for which flat surfaces are linearly unstable to periodic perturbations. We show that the latter leads to non-trivial scaling behavior in an appropriate parameter range when combined with the Kardar-Parisi-Zhang (KPZ) non-linearity, that nevertheless does not correspond to the KPZ universality class. This novel asymptotic behavior is characterized by two scaling laws that fix the critical exponents to dimension-independent values, that agree with previous reports from numerical simulations and experimental systems. We show that the precise form of the linear stabilizing terms does not modify the hydrodynamic behavior of these equations. One of the scaling laws, usually associated with Galilean invariance, is shown to derive from a vertex cancellation that occurs (at least to one loop order) for any choice of linear terms in the equation of motion and is independent on the morphological stability of the surface, hence generalizing this well-known property of the KPZ equation. Moreover, the argument carries over to other systems like the Lai-Das Sarma-Villain equation, in which vertex cancellation is known {\em not to} imply an associated symmetry of the equation.

Affiliated with

Also associated with

No associations

Rating

Dynamical Renormalization Group Study for a Class of Non-local Interface Equations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical Renormalization Group Study for a Class of Non-local Interface Equations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical Renormalization Group Study for a Class of Non-local Interface Equations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-271659