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arXiv 1012.2856math-phcond-mat.stat-mechhep-thmath.MPnlin.SI
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伊辛相关与椭圆行列式

Ising correlations and elliptic determinants

N. Iorgov, O. Lisovyy

摘要:

周期晶格上二维伊辛模型的关联函数可以用自旋算符的形状因子-矩阵元来表示。该模型的自由费米子结构意味着任何多粒子形状因子都是由两粒子构成的矩阵的pf函数给出的。交叉两粒子形状因子可以通过对自旋共轭在费米子上诱导的线性变换矩阵的块求逆来获得。我们表明,相应的矩阵是椭圆柯西型,并使用此观察明确解决反演问题。非交叉的两粒子形状因子,然后得到使用theta函数插值公式。本文给出了A. Bugrij和作者之一。

英文摘要:

Correlation functions of the two-dimensional Ising model on the periodic lattice can be expressed in terms of form factors - matrix elements of the spin operator in the basis of common eigenstates of the transfer matrix and translation operator. Free-fermion structure of the model implies that any multiparticle form factor is given by the pfaffian of a matrix constructed from the two-particle ones. Crossed two-particle form factors can be obtained by inverting a block of the matrix of linear transformation induced on fermions by the spin conjugation. We show that the corresponding matrix is of elliptic Cauchy type and use this observation to solve the inversion problem explicitly. Non-crossed two-particle form factors are then obtained using theta functional interpolation formulas. This gives a new simple proof of the factorized formulas for periodic Ising form factors, conjectured by A. Bugrij and one of the authors.

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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