High-Dimensional Diffusive Growth

Details High-Dimensional Diffusive Growth High-Dimensional Diffusive Growth

2000-10-25

arxiv.org/abs/cond-mat/0010400v2

Europhys. Lett. 55 (5), 679 (2001).

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures; reference added

Scientific paper

10.1209/epl/i2001-00469-9

We consider a model of aggregation, both diffusion-limited and ballistic, based on the Cayley tree. Growth is from the leaves of the tree towards the root, leading to non-trivial screening and branch competition effects. The model exhibits a phase transition between ballistic and diffusion-controlled growth, with non-trivial corrections to cluster size at the critical point. Even in the ballistic regime, cluster scaling is controlled by extremal statistics due to the branching structure of the Cayley tree; it is the extremal nature of the fluctuations that enables us to solve the model.

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