Persistence in higher dimensions : a finite size scaling study

Details Persistence in higher dimensions : a finite size scaling study Persistence in higher dimensions : a finite size scaling study

2000-09-13

arxiv.org/abs/cond-mat/0009189v1

Physics

Condensed Matter

Statistical Mechanics

4 pages in RevTeX with 6 figures. To appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.62.7755

We show that the persistence probability $P(t,L)$, in a coarsening system of linear size $L$ at a time $t$, has the finite size scaling form $P(t,L)\sim L^{-z\theta}f(\frac{t}{L^{z}})$ where $\theta$ is the persistence exponent and $z$ is the coarsening exponent. The scaling function $f(x)\sim x^{-\theta}$ for $x \ll 1$ and is constant for large $x$. The scaling form implies a fractal distribution of persistent sites with power-law spatial correlations. We study the scaling numerically for Glauber-Ising model at dimension $d = 1$ to 4 and extend the study to the diffusion problem. Our finite size scaling ansatz is satisfied in all these cases providing a good estimate of the exponent $\theta$.

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