DYNAMICAL MULTISCALING IN QUENCHED SKYRME SYSTEMS

Strong dynamical scaling violations exist in quenched two-dimensional systems with vector O(3) order parameters. These systems support non-s ingular topologically stable configurations (skyrmions). By tuning the stability of isolated skyrmions to expand or shrink, we find dramatic differences in the dynamical multiscaling spectrum of decaying moment s [\rho\(n)] of the topological charge density distribution and in par ticular in the decay of the energy density epsilon similar to [\rho\]. We present a simple two-length-scale model for the observed exponents in the case when isolated skyrmions expand. No such simple model is f ound when isolated skyrmions shrink.