Algebraic decay in hierarchical graphs

Details Algebraic decay in hierarchical graphs Algebraic decay in hierarchical graphs

2002-04-23

arxiv.org/abs/nlin/0204056v1

Nonlinear Sciences

Chaotic Dynamics

15 pages, 4 figures, 1 table. To appear in J. Stat. Phys

Scientific paper

We study the algebraic decay of the survival probability in open hierarchical graphs. We present a model of a persistent random walk on a hierarchical graph and study the spectral properties of the Frobenius-Perron operator. Using a perturbative scheme, we derive the exponent of the classical algebraic decay in terms of two parameters of the model. One parameter defines the geometrical relation between the length scales on the graph, and the other relates to the probabilities for the random walker to go from one level of the hierarchy to another. The scattering resonances of the corresponding hierarchical quantum graphs are also studied. The width distribution shows the scaling behavior $P(\Gamma) \sim 1/\Gamma$.

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