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arXiv 1005.0487math-phcond-mat.str-elhep-thmath.MPnlin.SI
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Inozemtsev双曲自旋模型及其相关自旋链

Inozemtsev's hyperbolic spin model and its related spin chain

J. C. Barba, F. Finkel, A. Gonzalez-Lopez, M. A. Rodriguez

摘要:

本文研究了Inozemtsev的具有双曲相互作用的su(m)量子自旋模型以及由Frahm和Inozemtsev引入的Haldane-Shastry型自旋链。我们计算了Inozemtsev模型的谱,并利用这个结果和冻结技巧导出了Frahm-Inozemtsev链的配分函数的简单解析表达式。我们发现,后者链的能级可以写在通常的图案的Haldane-Shastry链,虽然有不同的色散关系。利用配分函数的公式分析了能级密度的行为和连续展开能级间的间距分布。我们讨论的相关性,我们的结果与两个著名的apturtures在量子混沌。

英文摘要:

In this paper we study Inozemtsev's su(m) quantum spin model with hyperbolic interactions and the associated spin chain of Haldane-Shastry type introduced by Frahm and Inozemtsev. We compute the spectrum of Inozemtsev's model, and use this result and the freezing trick to derive a simple analytic expression for the partition function of the Frahm-Inozemtsev chain. We show that the energy levels of the latter chain can be written in terms of the usual motifs for the Haldane-Shastry chain, although with a different dispersion relation. The formula for the partition function is used to analyze the behavior of the level density and the distribution of spacings between consecutive unfolded levels. We discuss the relevance of our results in connection with two well-known conjectures in quantum chaos.

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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