Phase-ordering of conserved vectorial systems with field-dependent mobility

Abstract

The dynamics of phase-separation in conserved systems with an O(N) continuous symmetry is investigated in the presence of an order parameter dependent mobility M(ϕ)=1-a ϕ^2. The model is studied analytically in the framework of the large-N approximation and by numerical simulations of the N=2, N=3 and N=4 cases in d=2, for both critical and off-critical quenches. We show the existence of a new universality class for a=1 characterized by a growth law of the typical length L(t) ~ t^{1/z} with dynamical exponent z=6 as opposed to the usual value z=4 which is recovered for a<1.

RevTeX, 8 pages, 13 figures, to be published in Phys. Rev. E

References in corpus (3)

• Phase Separation Kinetics in a Model with Order-Parameter Dependent Mobility
• Condensation vs. phase-ordering in the dynamics of first order transitions
• Coarsening and Pinning in the Self-consistent Solution of Polymer Blends Phase-Separation Kinetics

Cited by in corpus (4)

• Aging and Crossovers in Phase-Separating Fluid Mixtures
• The Effect of Shear on Phase-Ordering Dynamics with Order-Parameter-Dependent Mobility: The Large-n Limit
• Complex phase-ordering of the one-dimensional Heisenberg model with conserved order parameter
• Sheared phase-separating binary mixtures with surface diffusion