arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0907.0755physics.soc-phcond-mat.stat-mech
收藏

无标度网络中的爆炸渗流

Explosive percolation in scale-free networks

Filippo Radicchi, Santo Fortunato

摘要:

我们研究通过合作Achlioptas增长过程构建的无标度网络。在网络中引入节点之间的链接,以产生具有给定度分布指数lambda的无标度图,但每个新链接的选择取决于该链接将合并的集群的质量。通过这种有偏的过程构建的网络显示出一个渗透过渡,这与在标准渗透中观察到的有很大不同,在标准渗透中,链接是随机引入的。不同的生长过程导致相变具有非零渗流阈值已经为λ> λ_c ~ 2.2。更有趣的是,当λ <= 3时,跃迁是连续的,但当λ> 3时,跃迁变得不连续。这可能对网络的结构和网络上发生的过程的动态都有重要的影响。

英文摘要:

We study scale-free networks constructed via a cooperative Achlioptas growth process. Links between nodes are introduced in the network in order to produce a scale-free graph with given exponent lambda for the degree distribution, but the choice of each new link depends on the mass of the clusters that this link will merge. Networks constructed via this biased procedure show a percolation transition which strongly differs from the one observed in standard percolation, where links are introduced just randomly. The different growth process leads to a phase transition with a non-vanishing percolation threshold already for lambda > lambda_c ~ 2.2. More interestingly, the transition is continuous when lambda <= 3 but becomes discontinuous when lambda > 3. This may have important consequences both for the structure of networks and for the dynamics of processes taking place on them.

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。

↑