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arXiv 2010.11207math.PRmath-phmath.MP
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开ASEP上非简单变分的KPZ方程

KPZ Equation from non-simple variations on open ASEP

Kevin Yang

摘要:

本文有两个主要目标。第一个是KPZ方程的普遍性波动的动态界面的相互作用的粒子系统在存在的开放边界。我们考虑从[Corwin-Shen '16,Parekh '17]中对开放ASEP的推广,但承认在边界和粒子系统的大部分内的非简单相互作用。这些开放ASEP的变化是不可积的模型,类似于[Dembo-Tsai '15,Y '20]中考虑的ASEP的长程变化。我们建立了KPZ方程与适当的罗宾边界条件作为标度限制的高度函数波动与这些不可积的模型,提供了进一步的证据,上述的普遍性的KPZ方程。我们专注于紧凑域和地址非紧域在第二篇论文。我们用来建立上述定理的过程是本文的第二个要点。存在边界相互作用时的不变测度一般缺乏合理的描述。因此,通过不变测度进行的全局分析,包括[Goncalves-Jara '14,Goncalves-Jara '17,Goncalves-Jara-Sethuraman '15]中的能量解理论,立即受到阻碍。为了绕过这一障碍,我们呼吁[Y '20]中分析的几乎完全局部性质。

英文摘要:

This paper has two main goals. The first is universality of the KPZ equation for fluctuations of dynamic interfaces associated to interacting particle systems in the presence of open boundary. We consider generalizations on the open-ASEP from [Corwin-Shen '16, Parekh '17] but admitting non-simple interactions both at the boundary and within the bulk of the particle system. These variations on open-ASEP are not integrable models, similar to the long-range variations on ASEP considered in [Dembo-Tsai '15, Y '20]. We establish the KPZ equation with the appropriate Robin boundary conditions as scaling limits for height function fluctuations associated to these non-integrable models, providing further evidence for the aforementioned universality of the KPZ equation. We specialize to compact domains and address non-compact domains in a second paper. The procedure that we employ to establish the aforementioned theorem is the second main point of this paper. Invariant measures in the presence of boundary interactions generally lack reasonable descriptions. Thus, global analyses done through the invariant measure, including the theory of energy solutions in [Goncalves-Jara '14, Goncalves-Jara '17, Goncalves-Jara-Sethuraman '15], is immediately obstructed. To circumvent this obstruction, we appeal to the almost entirely local nature of the analysis in [Y '20].

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