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arXiv 1204.1192hep-thcond-mat.stat-mech
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伊辛模型中的复合分支点扭转场及其期望值

Composite branch-point twist fields in the Ising model and their expectation values

Emanuele Levi

摘要:

本文研究了$n$ -拷贝伊辛模型的一个特殊的两点函数。即,涉及能量场和分支点扭曲场的关联函数$\vev{\E(r)\T(0)}$。后者是与对称性的理论下循环排列的副本。我们使用一个形状因子展开,以获得一个精确的积分表示的$\vev{\E(r)\T(0)}$,并找到其完整的短距离展开。这使我们能够识别所有的字段中的短距离大量OPE的关联函数在检查,并固定其期望值,共形结构常数和大量的修正。大部分贡献是由复合场$:\E\T:$及其导数给出的。我们发现后一个算子的所有非零形状因子。

英文摘要:

We investigate a particular two-point function of the $n$-copy Ising model. That is, the correlation function $\vev{\E(r)\T(0)}$ involving the energy field and the branch-point twist field. The latter is associated to the symmetry of the theory under cyclic permutations of its copies. We use a form factor expansion to obtain an exact integral representation of $\vev{\E(r)\T(0)}$ and find its complete short distance expansion. This allows us to identify all the fields contributing in the short distance massive OPE of the correlation function under examination, and fix their expectation values, conformal structure constants and massive corrections thereof. Most contributions are given by the composite field $:\E\T:$ and its derivatives. We find all non-vanishing form factors of this latter operator.

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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