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arXiv 2402.04112math-phmath.MPnlin.SI
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开放XYZ自旋1/2链:边界场满足约束条件时的分离变量与标量积

The open XYZ spin 1/2 chain: Separation of Variables and scalar products for boundary fields related by a constraint

G. Niccoli, V. Terras

AI总结:

本文用新的分离变量法求解开放XYZ自旋链,在边界参数满足约束时,将分离态的标量积行列式推广为Slavnov形式,便于研究均匀与热力学极限。

摘要:

我们考虑具有边界场的开放XYZ自旋链。我们通过arXiv:1904.00852中引入的新的分离变量方法求解该模型。在此框架下,转移矩阵的本征态作为所谓的分离态类中的一个特定子类获得。我们考虑计算此类分离态的标量积问题。通常,它们可以表示为行列式,其行由模型的不均匀性参数标记。我们特别关注边界参数满足一个约束的特殊情况,该约束参数化两个边界场,从而能够用通常TQ方程的某个椭圆多项式Q解来描述部分转移矩阵谱和本征态。在这种情况下,我们展示了如何将上述用于标量积的行列式变换为更适合考虑均匀和热力学极限的形式:如同开放XXX或XXZ情形,我们的结果可以表示为所谓的Slavnov行列式的某种推广。

英文摘要:

We consider the open XYZ spin chain with boundary fields. We solve the model by the new Separation of Variables approach introduced in arXiv:1904.00852. In this framework, the transfer matrix eigenstates are obtained as a particular sub-class of the class of so-called separate states. We consider the problem of computing scalar products of such separate states. As usual, they can be represented as determinants with rows labelled by the inhomogeneity parameters of the model. We notably focus on the special case in which the boundary parameters parametrising the two boundary fields satisfy one constraint, hence enabling for the description of part of the transfer matrix spectrum and eigenstates in terms of some elliptic polynomial Q-solution of a usual TQ-equation. In this case, we show how to transform the aforementioned determinant for the scalar product into some more convenient form for the consideration of the homogeneous and thermodynamic limits: as in the open XXX or XXZ cases, our result can be expressed as some generalisation of the so-called Slavnov determinant.

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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