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arXiv 1302.6712math-phmath.MP
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统计可积模型II中的椭圆函数

The Elliptic Function in Statistical Integrable Models II

Kazuyasu Shigemoto

摘要:

二维统计可积模型,如伊辛模型,手征Potts模型和Belavin模型,都是可积的.由于这些模型的SU(2)对称性,这些模型成为可积的。积分模型通常由椭圆函数或椭圆θ函数参数化。本文研究了伊辛模型,证明了伊辛模型的Yang-Baxter方程可以写成SU(2)的可积条件,并通过球面三角关系和椭圆函数的联系,给出了伊辛模型可以用椭圆函数参数化的自然解释。椭圆函数的加法公式是伊辛模型精确可解的秘密。

英文摘要:

Two dimensional statistical integrable models, such as the Ising model, the chiral Potts model and the Belavin model, becomes integrable. Because of the SU(2) symmetry of these models, these models become integrable. The integral models are often parameterized by the elliptic function or the elliptic theta function. In this paper, we study the Ising model, and we show that the Yang-Baxter equation of the Ising model can be written as the integrability condition of SU(2), and we gives the natural explanation why the Ising model can be parameterized by the elliptic function by connecting the spherical trigonometry relation and the elliptic function. Addition formula of the elliptic function is the secret of the exact solvability of the Ising model.

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