Intermittency for branching random walk in Pareto environment
Intermittency for branching random walk in Pareto environment
复制标题
帕累托环境中分支随机游走的间歇性
DOI:
10.1214/15-aop1021
复制
发表时间:
2014
影响因子:
2.3
通讯作者:
Matthew I. Roberts
中科院分区:
文献类型:
--
作者:
Marcel Ortgiese;Matthew I. Roberts
We consider a branching random walk on the lattice, where the branching rates are given by an i.i.d. Pareto random potential. We describe the process, including a detailed shape theorem, in terms of a system of growing lilypads. As an application we show that the branching random walk is intermittent, in the sense that most particles are concentrated on one very small island with large potential. Moreover, we compare the branching random walk to the parabolic Anderson model and observe that although the two systems show similarities, the mechanisms that control the growth are fundamentally different.