Characteristics of the asymmetric simple exclusion process in the presence of quenched spatial disorder.
Characteristics of the asymmetric simple exclusion process in the presence of quenched spatial disorder.
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DOI：
10.1103/physreve.75.011127
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发表时间：
2007-01
期刊：
影响因子：
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通讯作者：
M. Ebrahim Foulaadvand;Sanaz Chaaboki;M. Saalehi
中科院分区：
文献类型：
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作者：
M. Ebrahim Foulaadvand;Sanaz Chaaboki;M. Saalehi
我们研究了猝灭的空间无序跳跃率对具有开放边界的非对称简单排斥过程的影响。无序平均的堆积密度和电流的各种输入和输出率方面获得。我们研究了无序的二进制和均匀分布。结果表明，空间不均匀性的作用一般是增大最大电流相的尺寸。这与Harris和Stinchcombe [Phys.Rev.E70，016108（2004）]获得的平均场结果一致。此外，我们得到的电流和体积密度的无序分布函数的特性的依赖关系。结果表明，无序的影响主要取决于粒子的输入和输出速率。在某些情况下，无序可以建设性地增强电流。
We investigate the effect of quenched spatial disordered hopping rates on the characteristics of the asymmetric simple exclusion process with open boundaries both numerically and by extensive simulations. Disorder averages of the bulk density and current are obtained in terms of various input and output rates. We study the binary and uniform distributions of disorder. It is verified that the effect of spatial inhomogeneity is generically to enlarge the size of the maximal-current phase. This is in accordance with the mean-field results obtained by Harris and Stinchcombe [Phys. Rev. E 70, 016108 (2004)]. Furthermore, we obtain the dependence of the current and the bulk density on the characteristics of the disorder distribution function. It is shown that the impact of disorder crucially depends on the particle input and out rates. In some situations, disorder can constructively enhance the current.