对于TASEP的非相交路径施工,具有不均的速率和KPZ的固定点
Elia Bisi1, Yuchen Liao2, Axel Saenz3
1Institut für Stochastik und Wirtschaftsmathematik, Technische Universität Wien, E 105-07, Wiedner Hauptstraße 8-10, 1040 Wien, Austria.
概括
我们引入了一种新方法来分析具有复杂粒子和时间依赖的跳跃率的完全不对称的简单排除过程 (TASEP). 这种方法使用组合学和格子路径合集来获得粒子分布的确切结果.
科学领域:
- 可能性理论概率理论.
- 统计力学 统计力学
- 组合学是一种组合学.
背景情况:
- 完全不对称的简单排除过程 (TASEP) 是统计力学的一个基本模型.
- 分析TASEP与非统一的,时间依赖的利率提出了重大的数学挑战.
- 现有的方法往往难以应对不均参数带来的复杂性.
研究的目的:
- 开发一个新的框架来研究离散时间TASEP与粒子依赖和时间不均的跳跃率.
- 用组合对象和确定点过程来表达系统的过渡内核.
- 为了获得粒子位置的联合分布的确切公式.
主要方法:
- 使用罗宾逊-申斯特德-克努斯对应的组合学.
- 使用交织关系将粒子系统连接到格子路径组合.
- 通过一个离散热方程的边界值问题来表达相关性核心.
主要成果:
- 过渡内核以加权的,不相交的格子路径集体表示.
- 联合粒子分布的公式是弗雷德霍尔姆决定数.
- 相关性内核是根据随机步行撞击概率推导的,一般化了以前的结果.
结论:
- 开发的方法为分析复杂的TASEP模型提供了一个强大的工具.
- 对于完全不均的案例的解决方案,与均的TASEP相比,显示出更细致的结构.
- 这项工作扩大了对具有现实性,非均动态的相互作用粒子系统的理解.
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