Phase Transition for the Speed of the Biased Random Walk on the Supercritical Percolation Cluster
Phase Transition for the Speed of the Biased Random Walk on the Supercritical Percolation Cluster
复制标题
超临界渗流簇上偏置随机游走速度的相变
DOI:
10.1002/cpa.21491
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发表时间:
2013
影响因子:
3
通讯作者:
Fribergh A
中科院分区:
文献类型:
--
作者:
Fribergh A
We prove the sharpness of the phase transition for the speed in biased random walk on the supercritical percolation cluster on ℤd. That is, for eachd≥ 2, and for any supercritical parameterp>pc, we prove the existence of a critical strength for the bias such that below this value the speed is positive, and above the value it is zero. We identify the value of the critical bias explicitly, and in the subballistic regime, we find the polynomial order of the distance moved by the particle. Each of these conclusions is obtained by investigating the geometry of the traps that are most effective at delaying the walk.A key element in proving our results is to understand that, on large scales, the particle trajectory is essentially one‐dimensional; we prove such adynamic renormalizationstatement in a much stronger form than was previously known. © 2013 Wiley Periodicals, Inc.
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