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arXiv 1105.4906math.PRmath-phmath.MP
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关于多物种的不对称简单排它过程

On the asymmetric simple exclusion process with multiple species

Craig A. Tracy, Harold Widom

摘要:

在整数上的非对称简单排它过程中,每个粒子等待指数时间,然后以概率p,如果位置未被占用,则它向右移动一步,否则它保持不变;如果位置未被占用,则以概率q=1-p,它向左移动一步,否则它保持不变。在以前的工作中,作者,使用Bethe Answer,发现N粒子ASEP的一个公式-一个多重积分的总和-的概率,一个系统是在一个特定的配置在时间t给定的初始配置。目前的工作扩展到的情况下,粒子是不同的物种,具有较高的物种优先于那些较低的物种的粒子。在这里,多重积分中的被积函数由一个关系系统定义,其一致性要求验证满足杨-巴克斯特方程。

英文摘要:

In the asymmetric simple exclusion process on the integers each particle waits exponential time, then with probability p it moves one step to the right if the site is unoccupied, otherwise it stays put; and with probability q=1-p it moves one step to the left if the site is unoccupied, otherwise it stays put. In previous work the authors, using the Bethe Ansatz, found for N-particle ASEP a formula --- a sum of multiple integrals --- for the probability that a system is in a particular configuration at time t given an initial configuration. The present work extends this to the case where particles are of different species, with particles of a higher species having priority over those of a lower species. Here the integrands in the multiple integrals are defined by a system of relations whose consistency requires verifying that the Yang-Baxter equations are satisfied.

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