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arXiv 1602.07076math-phmath.MP
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星三角关系的拟经典展开与四元图上的可积系统

Quasi-classical expansion of the star-triangle relation and integrable systems on quad-graphs

Vladimir V. Bazhanov, Andrew P. Kels, Sergey M Sergeev

摘要:

在本文中,我们给出了一个概述的精确解决的边缘相互作用模型,其中的自旋被放置在一个平面晶格的网站,并通过连接网站的边缘相互作用。我们只考虑在晶格的每个位置处的单个自旋自由度的情况。这种模型的杨-巴克斯特方程采用一种特殊的简单形式,称为星三角关系。有趣的是,这个关系的所有已知解都可以作为单个“主解”的特殊情况来获得,该“主解”通过椭圆伽马函数来表示,并且具有取圆的值的连续自旋。我们表明,在低温(或准经典)的限制,这些晶格模型再现经典的离散可积系统的平面图先前获得和分类的Adler,Bobenko和Suris通过一致性周围的立方体的方法。我们还讨论了反演关系、星三角关系中Baxter的与速度无关的参数的物理意义以及经典系统在晶格的星三角(或立方翻转)变换下的作用量不变性,这是Baxter的Z-不变性在相关晶格模型中的直接结果。

英文摘要:

In this paper we give an overview of exactly solved edge-interaction models, where the spins are placed on sites of a planar lattice and interact through edges connecting the sites. We only consider the case of a single spin degree of freedom at each site of the lattice. The Yang-Baxter equation for such models takes a particular simple form called the star-triangle relation. Interestigly all known solutions of this relation can be obtained as particular cases of a single "master solution", which is expressed through the elliptic gamma function and have continuous spins taking values of the circle. We show that in the low-temperature (or quasi-classical) limit these lattice models reproduce classical discrete integrable systems on planar graphs previously obtained and classified by Adler, Bobenko and Suris through the consistency-around-a-cube approach. We also discuss inversion relations, the physicical meaning of Baxter's rapidity-independent parameter in the star-triangle relations and the invariance of the action of the classical systems under the star-triangle (or cube-flip) transformation of the lattice, which is a direct consequence of Baxter's Z-invariance in the associated lattice models.

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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