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arXiv 1201.2625math-phcond-mat.str-elhep-thmath.MP
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含无序参数II的六顶点模型的线性积分方程的性质

Properties of linear integral equations related to the six-vertex model with disorder parameter II

Hermann Boos, Frank Göhmann

摘要:

我们研究某些功能中产生的背景下的关联函数的XXZ自旋链和可积场论相关的各种标度限制的基础六顶点模型的计算。我们表明,这些功能是相关的线性积分方程可以通过与(变形)差分算子上的主函数$Φ$。后者是定义在一个功能方程和它的渐近行为。集中在所谓的温度的情况下,我们表明,这些条件唯一地确定了主函数的高温级数展开。这也为导出函数的高温展开提供了一种有效的计算方案。

英文摘要:

We study certain functions arising in the context of the calculation of correlation functions of the XXZ spin chain and of integrable field theories related with various scaling limits of the underlying six-vertex model. We show that several of these functions that are related to linear integral equations can be obtained by acting with (deformed) difference operators on a master function $Φ$. The latter is defined in terms of a functional equation and of its asymptotic behavior. Concentrating on the so-called temperature case we show that these conditions uniquely determine the high-temperature series expansions of the master function. This provides an efficient calculation scheme for the high-temperature expansions of the derived functions as well.

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