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arXiv 0812.2746math-phmath.MP
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环空上的共形双边界环模型

Conformal two-boundary loop model on the annulus

Jerome Dubail, Jesper Lykke Jacobsen, Hubert Saleur

摘要:

我们研究了临界区-2 < n < 2的圈模型的双边界扩展--对应于O(n)模型的稠密相,或者Q=n^2态Potts模型。该模型定义在纵横比为τ的环上。接触环的左边、右边或两边的环由任意(实)权重区分,而且取决于它们是否包裹周期方向。这些权重的任何值对应于共形不变的边界条件。通过代数和场论论证的结合,我们获得了连续极限中精确的七参数配分函数,作为τ的函数。作为一个具体应用,我们导出了一些新的逾渗团簇的交叉公式。

英文摘要:

We study the two-boundary extension of a loop model - corresponding to the dense phase of the O(n) model, or to the Q=n^2 state Potts model - in the critical regime -2 < n < 2. This model is defined on an annulus of aspect ratio τ. Loops touching the left, right, or both rims of the annulus are distinguished by arbitrary (real) weights which moreover depend on whether they wrap the periodic direction. Any value of these weights corresponds to a conformally invariant boundary condition. We obtain the exact seven-parameter partition function in the continuum limit, as a function of τ, by a combination of algebraic and field theoretical arguments. As a specific application we derive some new crossing formulae for percolation clusters.

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