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arXiv 0909.2968math-phcond-mat.stat-mechhep-thmath.MP
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D_N型自旋Sutherland模型及其自旋链

The spin Sutherland model of D_N type and its associated spin chain

B. Basu-Mallick, F. Finkel, A. Gonzalez-Lopez

摘要:

本文研究了用Polychronakos冻结技巧得到的D_N型SU(m)自旋Sutherland(三角)模型及其相应的Haldane-Shastry型自旋链。正如作者最近研究的有理情形一样,我们证明了这些是新的模型,其性质不能通过取适当的极限而简单地从它们著名的BC_N对应模型中推导出来。我们确定了自旋动力学模型的Weyl不变扩展位形空间,它是菱形十二面体的N维推广。这实际上是本文所研究的模型与理性模型和BC_N模型相比更为复杂的原因之一。通过构造哈密顿量三角作用的自旋动力学模型的希尔伯特空间的非正交基,我们计算了它的封闭形式的谱。利用这一结果并应用冻结技巧,我们导出了D_N型Haldane-Shastry自旋链的配分函数的精确表达式。

英文摘要:

In this paper we study the su(m) spin Sutherland (trigonometric) model of D_N type and its related spin chain of Haldane-Shastry type obtained by means of Polychronakos's freezing trick. As in the rational case recently studied by the authors, we show that these are new models, whose properties cannot be simply deduced from those of their well-known BC_N counterparts by taking a suitable limit. We identify the Weyl-invariant extended configuration space of the spin dynamical model, which turns out to be the N-dimensional generalization of a rhombic dodecahedron. This is in fact one of the reasons underlying the greater complexity of the models studied in this paper in comparison with both their rational and BC_N counterparts. By constructing a non-orthogonal basis of the Hilbert space of the spin dynamical model on which its Hamiltonian acts triangularly, we compute its spectrum in closed form. Using this result and applying the freezing trick, we derive an exact expression for the partition function of the associated Haldane-Shastry spin chain of D_N type.

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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