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arXiv 1911.03348math-phcond-mat.stat-mechmath.MPnlin.SI
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关于超对称八顶点模型的转移矩阵。II。开边界条件

On the transfer matrix of the supersymmetric eight-vertex model. II. Open boundary conditions

Christian Hagendorf, Jean Liénardy

摘要:

研究了具有$L\geqslant 1$垂线和开边界条件的正方形八顶点模型的传递矩阵。它示出,对于顶点权重$a,b,c,d$,服从关系$(a^2+ab)(b^2+ab)=(c^2+ab)(d^2+ab)$和适当选择的$K$ -矩阵$K^\pm$这个转移矩阵具有非常简单的,非退化的本征值$Λ_L = (a+b)^{2L}\,\text{tr}(K^+K^-)$。对于正的顶点权重,$Λ_L$被证明是最大的转移矩阵特征值。相应的本征空间等于相关XYZ自旋链的哈密顿量的基态的空间。证明中的一个重要因素是这个哈密顿量的超对称性。

英文摘要:

The transfer matrix of the square-lattice eight-vertex model on a strip with $L\geqslant 1$ vertical lines and open boundary conditions is investigated. It is shown that for vertex weights $a,b,c,d$ that obey the relation $(a^2+ab)(b^2+ab)=(c^2+ab)(d^2+ab)$ and appropriately chosen $K$-matrices $K^\pm$ this transfer matrix possesses the remarkably simple, non-degenerate eigenvalue $Λ_L = (a+b)^{2L}\,\text{tr}(K^+K^-)$. For positive vertex weights, $Λ_L$ is shown to be the largest transfer-matrix eigenvalue. The corresponding eigenspace is equal to the space of the ground states of the Hamiltonian of a related XYZ spin chain. An essential ingredient in the proofs is the supersymmetry of this Hamiltonian.

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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