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arXiv 1111.3197cond-mat.stat-mech
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Ashkin-Teller模型和SLE中的自旋界面

Spin interfaces in the Ashkin-Teller model and SLE

Y. Ikhlef, M. A. Rajabpour

摘要:

研究了Ashkin-Teller模型中自旋界面的标度性质。这些接口是一个非常简单的例子晶格曲线共存的波动自由度,这使得分析确定其指数非常困难。我们的主要发现之一是建设的边界条件,确保在这种情况下,接口仍然满足马尔可夫财产。然后,使用一种新的技术的基础上的转移矩阵,我们计算的左通过概率的数值,我们的结果证实,自旋界面描述的SLE在标度极限。此外,在临界线的一个特殊点上,我们描述了Ashkin-Teller模型到一个可积的19顶点模型的映射,这个映射又与一个可积的稀释Brauer模型相联系.

英文摘要:

We investigate the scaling properties of the spin interfaces in the Ashkin-Teller model. These interfaces are a very simple instance of lattice curves coexisting with a fluctuating degree of freedom, which renders the analytical determination of their exponents very difficult. One of our main findings is the construction of boundary conditions which ensure that the interface still satisfies the Markov property in this case. Then, using a novel technique based on the transfer matrix, we compute numerically the left-passage probability, and our results confirm that the spin interface is described by an SLE in the scaling limit. Moreover, at a particular point of the critical line, we describe a mapping of Ashkin-Teller model onto an integrable 19-vertex model, which, in turn, relates to an integrable dilute Brauer model.

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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