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arXiv 1004.2095math.PRmath-phmath.MP
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一维漂移随机粒子系统的电流涨落

Current fluctuations for stochastic particle systems with drift in one spatial dimension

Timo Seppäläinen

摘要:

本文讨论了一维整数格点上几种粒子动力学随机系统:独立粒子、随机环境中的独立粒子、随机平均过程、非对称简单排它过程和一类完全非对称零程过程中粒子流的极限分布和方差界。前三个模型具有线性宏观通量函数,并位于爱德华-威尔金森普适类与标度指数1/4的电流波动。对于这些,我们证明高斯限制当前的过程。后两个系统属于Kardar-Parisi-Zhang类。对于这些,我们证明了标度指数1/3的形式的方差上界和下界。

英文摘要:

This review article discusses limit distributions and variance bounds for particle current in several dynamical stochastic systems of particles on the one-dimensional integer lattice: independent particles, independent particles in a random environment, the random average process, the asymmetric simple exclusion process, and a class of totally asymmetric zero range processes. The first three models possess linear macroscopic flux functions and lie in the Edwards-Wilkinson universality class with scaling exponent 1/4 for current fluctuations. For these we prove Gaussian limits for the current process. The latter two systems belong to the Kardar-Parisi-Zhang class. For these we prove the scaling exponent 1/3 in the form of upper and lower variance bounds.

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