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arXiv 2502.09262math-phmath.MP
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具有一般开放边界条件的$D_2^{(2)}$自旋链模型的精确物理量

Exact physical quantities of the $D_2^{(2)}$ spin chain model with generic open boundary conditions

Pengcheng Lu, Junpeng Cao, Wen-Li Yang, Ian Marquette, Yao-Zhong Zhang

AI总结:

本文利用$t$-$W$方法推导一般开放边界下$D_2^{(2)}$自旋链的齐次Bethe方程,并解析求得其表面能与激发能。

摘要:

我们研究了一般开放边界条件下与扭曲$D_2^{(2)}$代数相关的量子可积自旋链模型(或简称为$D_2^{(2)}$模型)。该模型的哈密顿量可分解为两条交错XXZ自旋链之和。应用$t$-$W$方法,我们推导了转移矩阵本征值零点的齐次Bethe ansatz方程,以及具有一般可积边界的交错XXZ自旋链相应零点的分布模式。基于这些结果,我们解析计算了$D_2^{(2)}$模型在边界参数不同区域中的表面能和激发能。

英文摘要:

We study the quantum integrable spin chain model associated with the twisted $D_2^{(2)}$ algebra (or simply the $D_2^{(2)}$ model) under generic open boundary conditions. The Hamiltonian of this model can be factorized into the sum of two staggered XXZ spin chains. Applying the $t$-$W$ method, we derive the homogeneous Bethe ansatz equations for the zeros of the transfer matrix eigenvalues and the patterns of the corresponding zeros of the staggered XXZ spin chain with generic integrable boundaries. Based on these results, we analytically compute the surface energies and excitation energies of the $D_2^{(2)}$ model in different regimes of boundary parameters.

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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