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arXiv 1202.4420math-phmath.MP
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八顶点模型在其组合直线上的求和规则

Sum rule for the eight-vertex model on its combinatorial line

P. Zinn-Justin

摘要:

研究了八顶点模型非齐次转移矩阵在其组合线上的受限基态本征向量,在$η=π/3$,它获得了一个特别简单的形式。我们计算了无限长圆柱上模型的配分函数,并对非均匀性作了一定的限制,在齐次极限下,我们得到了XYZ自旋链的基态的平方范数的表达式,作为微分递推关系的解.

英文摘要:

We investigate the conjectured ground state eigenvector of the 8-vertex model inhomogeneous transfer matrix on its combinatorial line, i.e., at $η=π/3$, where it acquires a particularly simple form. We compute the partition function of the model on an infinite cylinder with certain restrictions on the inhomogeneities, and taking the homogeneous limit, we obtain an expression for the squared norm of the ground state of the XYZ spin chain as a solution of a differential recurrence relation.

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