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

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

1998-07-02

arxiv.org/abs/cond-mat/9807039v1

Physics

Condensed Matter

Statistical Mechanics

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

Scientific paper

10.1103/PhysRevE.58.4658

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(\phi)=1-a \phi^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.

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