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arXiv 1210.7664math.PR
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互激随机游动

Mutually excited random walks

Noam Berger, Eviatar B. Procaccia

摘要:

考虑$\mathbb{Z}$上的两个随机游动。每次步行的转移概率取决于另一个步行者的轨迹,即,在另一个步行者访问两次或更多次的位置中获得漂移$p>1/2$。根据模拟,该简单模型具有在$p$中不是单调的速度,没有明显的“陷阱”行为。本文证明了对于$1/2<p<1$,该过程具有正的速度,并给出了一个确定性算法来逼近该速度,同时证明了该过程的非单调性。

英文摘要:

Consider two random walks on $\mathbb{Z}$. The transition probabilities of each walk is dependent on trajectory of the other walker i.e. a drift $p>1/2$ is obtained in a position the other walker visited twice or more. This simple model has a speed which is, according to simulations, not monotone in $p$, without apparent "trap" behaviour. In this paper we prove the process has positive speed for $1/2<p<1$, and present a deterministic algorithm to approximate the speed and show the non-monotonicity.

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。

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