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arXiv 0905.4000hep-thcond-mat.stat-mechquant-ph
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XYZ模型的精确纠缠熵及其sine-Gordon极限

Exact entanglement entropy of the XYZ model and its sine-Gordon limit

Elisa Ercolessi, Stefano Evangelisti, Francesco Ravanini

摘要:

通过将XYZ模型的约化密度矩阵与八顶点模型的角转移矩阵相联系,得到了XYZ模型的无限二分块的冯诺伊曼熵的精确表达式.然后我们考虑XYZ链的各向异性标度极限,得到1+1维sine-Gordon模型。我们提出了后者的纠缠熵的公式,它具有一个占主导地位的对数项加上一个常数的结构,与一般预期的大规模量子场论。

英文摘要:

We obtain the exact expression for the Von Neumann entropy for an infinite bipartition of the XYZ model, by connecting its reduced density matrix to the corner transfer matrix of the eight vertex model. Then we consider the anisotropic scaling limit of the XYZ chain that yields the 1+1 dimensional sine-Gordon model. We present the formula for the entanglement entropy of the latter, which has the structure of a dominant logarithmic term plus a constant, in agreement with what is generally expected for a massive quantum field theory.

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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