Random spreading phenomena in annealed small world networks

Details Random spreading phenomena in annealed small world networks Random spreading phenomena in annealed small world networks

2001-10-18

arxiv.org/abs/cond-mat/0110365v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1016/S0378-4371(02)00625-8

We study the simple random walk dynamics on an annealed version of a Small-World Network (SWN) consisting of $N$ nodes. This is done by calculating the mean number of distinct sites visited S(n) and the return probability $P_{00}(t)$ as a function of the time $t$. $S(t)$ is a key quantity both from the statistical physics point of view and especially for characterizing the efficiency of the network connectedness. Our results for this quantity shows features similar to the SWN with quenched disorder, but with a crossover time that goes inversely proportianal to the probability $p$ of making a long range jump instead of being proportional to $p^{-2}$ as in quenched case. We have also carried out simulations on a modified annealed model where the crossover time goes as $p^{-2}$ due to specific time dependent transition probabilities and we present an approximate self-consistent solution to it.

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