Asymmetric simple exclusion process and modified random matrix ensembles

Asymmetric simple exclusion process and modified random matrix ensembles
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DOI:
10.1016/j.nuclphysb.2004.08.016
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发表时间:
2004-05
期刊:
Nuclear Physics
影响因子:
--
通讯作者:
T. Nagao;T. Sasamoto
T. Nagao;T. Sasamoto
中科院分区:
其他
文献类型:
--
作者:
T. Nagao;T. Sasamoto

文献摘要

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我们研究无限一维晶格上的不对称简单排除过程(ASEP)的涨落性质。当N个粒子初始位于均匀密度ρ−=1的负区域时,Johansson证明了ASEP的电流波动与随机矩阵的最大特征值分布的等价性。我们扩展了 Johansson 公式并导出了修改后的随机矩阵系综,对应于一般 ASEP 初始条件。考虑标度极限,我们发现渐近电流波动的相位变化发生在临界位置。
We study the fluctuation properties of the asymmetric simple exclusion process (ASEP) on an infinite one-dimensional lattice. When N particles are initially situated in the negative region with a uniform density ρ−=1, Johansson showed the equivalence of the current fluctuation of ASEP and the largest eigenvalue distribution of random matrices. We extend Johansson's formula and derive modified ensembles of random matrices, corresponding to general ASEP initial conditions. Taking the scaling limit, we find that a phase change of the asymptotic current fluctuation occurs at a critical position.