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arXiv 2009.09159math.PR
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扩展源内部DLA在平面上的收敛速度

A Convergence Rate for Extended-Source Internal DLA in the Plane

David Darrow

摘要:

内部DLA(IDLA)是一种内部聚集模型,其中粒子依次从原点执行随机游动,并在到达未占用的站点时停止。Levine和Peres证明,当粒子从固定的多点分布开始时,修改后的IDLA过程具有与特定障碍问题相关的确定性缩放限制。在本文中,我们调查的收敛速度,这种“扩展源”IDLA在平面上的缩放限制。我们发现,如果$δ$是晶格尺寸,IDLA占据集的波动是最多的顺序$δ^{3/5}$从它的缩放限制,概率至少为$1-e^{-1/δ^{2/5}}$。

英文摘要:

Internal DLA (IDLA) is an internal aggregation model in which particles perform random walks from the origin, in turn, and stop upon reaching an unoccupied site. Levine and Peres showed that, when particles start instead from fixed multiple-point distributions, the modified IDLA processes have deterministic scaling limits related to a certain obstacle problem. In this paper, we investigate the convergence rate of this "extended source" IDLA in the plane to its scaling limit. We show that, if $δ$ is the lattice size, fluctuations of the IDLA occupied set are at most of order $δ^{3/5}$ from its scaling limit, with probability at least $1-e^{-1/δ^{2/5}}$.

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