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arXiv 2209.08282math.PR
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$d \geq 2$维扩散标度下非对称零程过程的平衡扰动

Equilibrium Perturbations for Asymmetric Zero Range Process under Diffusive Scaling in Dimensions $d \geq 2$

Linjie Zhao

摘要:

我们考虑了$d \geq 2$维中的非对称零程过程.假设初始密度分布是恒定密度的扰动,其具有$N^{-α}$、$α\in (0,1)$阶,并且沿着漂移方向是恒定的。这里,$N$是缩放参数。我们证明了在对零程过程的跳跃率的某些约束下,微扰量宏观上服从扩散标度下的热方程。

英文摘要:

We consider the asymmetric zero range process in dimensions $d \geq 2$. Assume the initial density profile is a perturbation of the constant density, which has order $N^{-α}$, $α\in (0,1)$, and is constant along the drift direction. Here, $N$ is the scaling parameter. We show that under some constraints on the jump rate of the zero range process, the perturbed quantity macroscopically obeys the heat equation under diffusive scaling.

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