Diffusion-limited aggregation as branched growth

Details Diffusion-limited aggregation as branched growth Diffusion-limited aggregation as branched growth

1994-01-31

arxiv.org/abs/cond-mat/9401077v1

Physics

Condensed Matter

13 pages, one figure not included (available by request, by ordinary mail), Plain TeX

Scientific paper

10.1103/PhysRevLett.72.1228

I present a first-principles theory of diffusion-limited aggregation in two dimensions. A renormalized mean-field approximation gives the form of the unstable manifold for branch competition, following the method of Halsey and Leibig [Phys. Rev. A {\bf 46}, 7793 (1992)]. This leads to a result for the cluster dimensionality, D \approx 1.66, which is close to numerically obtained values. In addition, the multifractal exponent \tau(3) = D in this theory, in agreement with a proposed `electrostatic' scaling law.

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