Spectral dimension of trees with a unique infinite spine

Abstract

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.

27 pages, 3 figures, minor corrections, results unchanged, as published

References in corpus (5)

• The spectral dimension of generic trees
• Condensation in nongeneric trees
• Dynamical dimensional reduction in toy models of 4D causal quantum gravity
• Multigraph models for causal quantum gravity and scale dependent spectral dimension
• Simply generated trees, conditioned Galton--Watson trees, random allocations and condensation

Cited by in corpus (2)

• Random walk on random infinite looptrees
• Spectral dimension in graph models of causal quantum gravity