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arXiv 0704.0957math.PR
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具有秩相关漂移的一维布朗粒子系统

One-dimensional Brownian particle systems with rank dependent drifts

Soumik Pal, Jim Pitman

摘要:

本文研究线性布朗运动的相互作用系统,其在每个时间点的漂移向量由当时坐标过程的相对秩决定。我们的主要目的是研究按递增顺序排列的布朗运动之间的间距的长程行为。对于许多布朗运动以这种方式相互作用,我们的特点漂移的法律的家庭的向量的间距是紧的,并显示其收敛到一个独特的固定联合分布的独立指数分布与不同的手段。我们还研究了一个特殊的可数无限系统,其中只有最小的布朗粒子得到一个常数向上漂移,并证明了独立同分布的指数间距保持平稳的动力学过程。也讨论了这个方向的一些相关猜想。

英文摘要:

We study interacting systems of linear Brownian motions whose drift vector at every time point is determined by the relative ranks of the coordinate processes at that time. Our main objective has been to study the long range behavior of the spacings between the Brownian motions arranged in increasing order. For finitely many Brownian motions interacting in this manner, we characterize drifts for which the family of laws of the vector of spacings is tight, and show its convergence to a unique stationary joint distribution given by independent exponential distributions with varying means. We also study one particular countably infinite system, where only the minimum Brownian particle gets a constant upward drift, and prove that independent and identically distributed exponential spacings remain stationary under the dynamics of such a process. Some related conjectures in this direction have also been discussed.

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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