Exact results for curvature-driven coarsening in two dimensions

Abstract

We consider the statistics of the areas enclosed by domain boundaries (`hulls') during the curvature-driven coarsening dynamics of a two-dimensional nonconserved scalar field from a disordered initial state. We show that the number of hulls per unit area that enclose an area greater than $A$ has, for large time $t$, the scaling form $N_h(A,t)=2c/(A+\lambda t)$, demonstrating the validity of dynamical scaling in this system, where $c=1/8\pi \sqrt{3}$ is a universal constant. Domain areas (regions of aligned spins) have a similar distribution up to very large values of $A/\lambda t$. Identical forms are obtained for coarsening from a critical initial state, but with $c$ replaced by $c/2$.

arXiv comment4 pages, 4 figures

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