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arXiv 0907.1264math-phcond-mat.stat-mechmath.COmath.MP
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畴壁六顶点模型的北极曲线

The arctic curve of the domain-wall six-vertex model

F. Colomo, A. G. Pronko

摘要:

本文讨论了在无序状态下具有畴壁边界条件的六顶点模型的“北极”曲线的形式问题。众所周知,在标度极限下,模型表现出相分离,有序和无序区域被一条光滑的曲线(称为北极曲线)急剧分开。为了找到这条曲线,我们研究了一个多重积分表示的空虚形成概率,一个关联函数设计来检测空间从有序到无序的过渡。我们猜想,北极曲线,任意选择的顶点权重,其特征在于几乎所有的相应的鞍点方程的根在相同的,已知的,值的冷凝条件。在显式计算中,我们限制到无序的制度,我们已经能够计算某些生成函数进入鞍点方程的标度极限。北极曲线是以参数形式获得的,一般看来是一条非代数曲线;在所谓的单位根情况下,它变成了一条代数曲线。北极曲线也讨论了应用$q$枚举(与$0<q\leq 4$)大交替符号矩阵的极限形状。特别是,作为$q\to 0$的极限形状往往是一个非平凡的极限曲线,由一个相对简单的方程。

英文摘要:

The problem of the form of the `arctic' curve of the six-vertex model with domain wall boundary conditions in its disordered regime is addressed. It is well-known that in the scaling limit the model exhibits phase-separation, with regions of order and disorder sharply separated by a smooth curve, called the arctic curve. To find this curve, we study a multiple integral representation for the emptiness formation probability, a correlation function devised to detect spatial transition from order to disorder. We conjecture that the arctic curve, for arbitrary choice of the vertex weights, can be characterized by the condition of condensation of almost all roots of the corresponding saddle-point equations at the same, known, value. In explicit calculations we restrict to the disordered regime for which we have been able to compute the scaling limit of certain generating function entering the saddle-point equations. The arctic curve is obtained in parametric form and appears to be a non-algebraic curve in general; it turns into an algebraic one in the so-called root-of-unity cases. The arctic curve is also discussed in application to the limit shape of $q$-enumerated (with $0<q\leq 4$) large alternating sign matrices. In particular, as $q\to 0$ the limit shape tends to a nontrivial limiting curve, given by a relatively simple equation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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