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arXiv 1202.3907math.PR
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树上的动力学约束自旋模型

Kinetically constrained spin models on trees

F. Martinelli, C. Toninelli

摘要:

我们分析动力学约束0-1自旋模型(KCSM)的有限连接的有根树和无根树。我们特别关注的类Friedrickson-Andersen模型FA-JF和他们的一个面向版本。这些树模型在物理学文献中特别相关,因为它们中的一些经历了具有玻璃化转变的混合第一-第二阶特征的遍历性断裂转变。在这里,我们首先确定遍历制度,并证明了FA-jf和OFA-jf模型的临界密度与一个合适的自助渗滤模型相吻合。接下来,我们证明了第一次积极的频谱差距在整个遍历制度通过一个新的论点的基础上鞅的想法。最后,我们讨论了如何将这种新技术推广到分析正则格点$\mathbb{Z}^d$上的KCSM。

英文摘要:

We analyze kinetically constrained 0-1 spin models (KCSM) on rooted and unrooted trees of finite connectivity. We focus in particular on the class of Friedrickson-Andersen models FA-jf and on an oriented version of them. These tree models are particularly relevant in physics literature since some of them undergo an ergodicity breaking transition with the mixed first-second order character of the glass transition. Here we first identify the ergodicity regime and prove that the critical density for FA-jf and OFA-jf models coincide with that of a suitable bootstrap percolation model. Next we prove for the first time positivity of the spectral gap in the whole ergodic regime via a novel argument based on martingales ideas. Finally, we discuss how this new technique can be generalized to analyze KCSM on the regular lattice $\mathbb{Z}^d$.

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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