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arXiv 0712.2849cond-mat.stat-mech
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随机游动种群上的随机游动

Random walk on a population of random walkers

E. Agliari, R. Burioni, D. Cassi, F. M. Neri

摘要:

我们考虑一个人口的$N$标记的随机步行者在基板上移动,和一个激发跳跃的步行者之间的接触。在时间$t$携带激励的步行者的标签$\mathcal{X}(t)$可以被视为随机过程,其中转移概率本身是随机过程。在映射到两个更简单的过程时,表征$\mathcal{X}(t)$的量可以在长时间和低步行者密度的限制下计算。结果与数值模拟进行了比较。几种不同的拓扑结构的基板底层扩散被认为是。

英文摘要:

We consider a population of $N$ labeled random walkers moving on a substrate, and an excitation jumping among the walkers upon contact. The label $\mathcal{X}(t)$ of the walker carrying the excitation at time $t$ can be viewed as a stochastic process, where the transition probabilities are a stochastic process themselves. Upon mapping onto two simpler processes, the quantities characterizing $\mathcal{X}(t)$ can be calculated in the limit of long times and low walkers density. The results are compared with numerical simulations. Several different topologies for the substrate underlying diffusion are considered.

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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