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arXiv 0802.2270cond-mat.stat-mechhep-latmath-phmath.MP
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三态Potts反铁磁体在切割晶格上的相变

Phase transition in the 3-state Potts antiferromagnet on the diced lattice

Roman Kotecky, Jesus Salas, Alan D. Sokal

摘要:

我们证明了在低温下(包括零温度),三态Potts反铁磁体在切割晶格(kagome晶格的对偶晶格)上具有熵驱动的长程序.然后,我们提出了蒙特卡罗模拟,使用聚类算法,3状态和4状态模型。三态模型在v = e ^J-1 =-0.860599 +-0.000004处有一个向高温无序相的相变,这似乎属于三态Potts铁磁体的普适类。四态模型在整个物理区域是无序的,包括在零温度下。

英文摘要:

We prove that the 3-state Potts antiferromagnet on the diced lattice (dual of the kagome lattice) has entropically-driven long-range order at low temperatures (including zero). We then present Monte Carlo simulations, using a cluster algorithm, of the 3-state and 4-state models. The 3-state model has a phase transition to the high-temperature disordered phase at v = e^J - 1 = -0.860599 +- 0.000004 that appears to be in the universality class of the 3-state Potts ferromagnet. The 4-state model is disordered throughout the physical region, including at zero temperature.

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