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arXiv 1507.04786math.PRcond-mat.stat-mech
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离散Atlas模型的平衡涨落

Equilibrium Fluctuations for a Discrete Atlas Model

F. Hernández, M. Jara, Fabio J. Valentim

摘要:

我们考虑一个离散版本的阿特拉斯模型,它对应于一个序列的零程过程的半无限长的线,在原点和发散密度的粒子源。我们表明,该模型的平衡波动是由一个随机热方程与诺依曼边界条件。结果表明,原点处的粒子流收敛于赫斯特指数H=1/4的分数布朗运动。

英文摘要:

We consider a discrete version of the Atlas model, which corresponds to a sequence of zero-range processes on a semi-infinite line, with a source at the origin and a diverging density of particles. We show that the equilibrium fluctuations of this model are governed by a stochastic heat equation with Neumann boundary conditions. As a consequence, we show that the current of particles at the origin converges to a fractional Brownian motion of Hurst exponent H=1/4.

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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