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arXiv 0905.2795cond-mat.stat-mech
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环上非对称单排斥过程的精确解和渐近性态

Exact solution and asymptotic behaviour of the asymmetric simple exclusion process on a ring

Masahiro Kanai, Katsuhiro Nishinari, Tetsuji Tokihiro

摘要:

本文研究了有限格点周期格上非对称简单排斥过程的一个精确解,随机和平行。然后,我们发现,配分函数和平均速度的显式公式表示的高斯超几何函数。为了得到这些结果,我们有效地利用了零程过程的配分函数的递归公式。零程过程对应于不对称的简单排除过程,如果一个选择相关的粒子的跳跃率,和递归给出的配分函数,在原则上,对于任何有限的系统大小。此外,我们揭示了平均速度在热力学极限下的渐近行为,将公式扩展为系统尺寸的级数。

英文摘要:

In this paper, we study an exact solution of the asymmetric simple exclusion process on a periodic lattice of finite sites with two typical updates, i.e., random and parallel. Then, we find that the explicit formulas for the partition function and the average velocity are expressed by the Gauss hypergeometric function. In order to obtain these results, we effectively exploit the recursion formula for the partition function for the zero-range process. The zero-range process corresponds to the asymmetric simple exclusion process if one chooses the relevant hop rates of particles, and the recursion gives the partition function, in principle, for any finite system size. Moreover, we reveal the asymptotic behaviour of the average velocity in the thermodynamic limit, expanding the formula as a series in system size.

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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