Geodesics and Recurrence of Random Walks in Disordered Systems
Geodesics and Recurrence of Random Walks in Disordered Systems
复制标题
无序系统中随机游走的测地线和递归
DOI:
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
Jean
中科院分区:
文献类型:
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作者:
D. Boivin;Jean
In a first-passage percolation model on the square lattice $Z^2$, if the passage times are independent then the number of geodesics is either $0$ or $+infty$. If the passage times are stationary, ergodic and have a finite moment of order $alpha > 1/2$, then the number of geodesics is either $0$ or $+infty$. We construct a model with stationary passage times such that $Elbrack t(e)^alpha
brack < infty$, for every $0 < alpha < 1/2$, and with a unique geodesic. The recurrence/transience properties of reversible random walks in a random environment with stationary conductances $( a(e);e$ is an edge of $mathbb{Z}^2)$ are considered.