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摘要翻译：
我们发展了一种计算非均匀XXX模型中的近邻自旋-自旋和手征-自旋关联函数的简单技术。解析地找到了手征-自旋序参量与模型参量$\omega$函数的精确表达式。用同样的方法，我们还计算了次近邻自旋-自旋关联函数。在极限$\omega->0$时，它再现了标准海森堡自旋链中次近邻自旋真空期望值的已知结果。该方法简单，可推广应用于近邻相关函数的计算，也可应用于XXZ模型中相关函数的计算。
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英文标题：
《Next-nearest-neighbor spin-spin and chiral-spin correlation functions in
generalized XXX chain》
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作者：
V. V. Mkhitaryan and A. G. Sedrakyan
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Strongly Correlated Electrons 强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We develop a simple technique for calculation of next to nearest neighbor spin-spin and chiral-spin correlation functions in inhomogeneous XXX model. Exact expression of the chiral-spin order parameter as a function of the model parameter, $\omega$, is analytically found. Using the same method we also calculate the next to nearest neighbor spin-spin correlation function. In the limit $\omega -> 0$ it reproduces the known result for the vacuum expectation value of the next to nearest neighbor spins in the standard Heisenberg spin chain. The technique is simple and can be extended for calculation of next to next to nearest neighbor correlation functions as well as for calculation of correlation functions in XXZ model.
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PDF链接：
https://arxiv.org/pdf/709.2481
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