Spectral dimension of trees with a unique infinite spine

Details Spectral dimension of trees with a unique infinite spine Spectral dimension of trees with a unique infinite spine

2012-02-24

arxiv.org/abs/1202.5388v1

Physics

Condensed Matter

Statistical Mechanics

27 pages, 3 figures

Scientific paper

Using generating functions techniques we develop a relation between the Hausdorff and spectral dimension of trees with a unique infinite spine. Furthermore, it is shown that if the outgrowths along the spine are independent and identically distributed, then both the Hausdorff and spectral dimension can easily be determined from the probability generating function of the random variable describing the size of the outgrowths at a given vertex, provided that the probability of the height of the outgrowths exceeding n falls off as the inverse of n. We apply this new method to both critical non-generic trees and the attachment and grafting model, which is a special case of the vertex splitting model, resulting in a simplified proof for the values of the Hausdorff and spectral dimension for the former and novel results for the latter.

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