arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0905.2682cond-mat.stat-mech
收藏

确定性无标度网络上的随机游动:精确结果

Random Walks on deterministic Scale-Free networks: Exact results

Elena Agliari, Raffaella Burioni

摘要:

研究了一类确定性无标度网络上的随机游动问题,该网络的度序列为指数为$γ=\log 3/\log2$的幂律。我们发现不同的第一次通过现象的确切结果,特别是,我们计算的概率第一次返回到主枢纽。这些结果允许导出精确的解析表达式的平均时间首次到达主枢纽,其领先的行为是由$τ\sim V^{1-1/γ}$,其中$V$表示的结构的大小,和平均值是在一组均匀分布在所有其他网站的图形的起始点。有趣的是,这个过程被证明是特别有效的。我们还讨论了该结构的热力学极限和一些局部拓扑性质。

英文摘要:

We study the random walk problem on a class of deterministic Scale-Free networks displaying a degree sequence for hubs scaling as a power law with an exponent $γ=\log 3/\log2$. We find exact results concerning different first-passage phenomena and, in particular, we calculate the probability of first return to the main hub. These results allow to derive the exact analytic expression for the mean time to first reach the main hub, whose leading behavior is given by $τ\sim V^{1-1/γ}$, where $V$ denotes the size of the structure, and the mean is over a set of starting points distributed uniformly over all the other sites of the graph. Interestingly, the process turns out to be particularly efficient. We also discuss the thermodynamic limit of the structure and some local topological properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑