On general-n coefficients in series expansions for row spin–spin correlation functions in the two-dimensional Ising model

On general-n coefficients in series expansions for row spin–spin correlation functions in the two-dimensional Ising model
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二维Ising模型中行自旋-自旋相关函数级数展开式的一般n系数

DOI:
10.1088/1751-8121/ac9654
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发表时间:
2022
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
Shrock, Robert
Shrock, Robert
中科院分区:
--
文献类型:
--
作者:
Shrock, Robert

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在二维伊辛模型中,我们考虑了自旋-自旋关联函数Rn =<$σ 0,0 σ n,0 <$.我们讨论了一种方法,用于计算一般的n表达式的系数在高温和低温系列展开的Rn和应用它来获得这样的表达式为几个高阶系数。除了他们的内在利益,这些结果可能是有用的,在继续寻求一个非线性常微分方程,其解决方案将确定RN,类似于已知的非线性常微分方程,其解决方案确定对角相关函数<$σ 0,0 σ n,n <$在这个模型。
We consider spin–spin correlation functions for spins along a row, R n=⟨ σ 0, 0 σ n, 0⟩, in the two-dimensional Ising model. We discuss a method for calculating general-n expressions for coefficients in high-temperature and low-temperature series expansions of R n and apply it to obtain such expressions for several higher-order coefficients. In addition to their intrinsic interest, these results could be useful in the continuing quest for a nonlinear ordinary differential equation whose solution would determine R n, analogous to the known nonlinear ordinary differential equation whose solution determines the diagonal correlation function⟨ σ 0, 0 σ n, n⟩ in this model.
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