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arXiv 1402.7003cond-mat.stat-mech
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连续破碎遍历玻璃动力学的逾渗方法

Percolation approach to glassy dynamics with continuously broken ergodicity

Jeferson J. Arenzon, Antonio Coniglio, Annalisa Fierro, Mauro Sellitto

摘要:

我们表明,在玻璃化转变附近的弛豫动力学连续遍历性打破可以被赋予基于渗流理论的几何解释。在平均场水平,这种方法是一致的模式耦合理论(MCT)的A型液体玻璃化转变,并允许解开的普遍和非普遍的贡献MCT弛豫指数。标度预测的时间关联函数成功地测试在F12示意性模型和促进自旋系统上的贝特晶格。我们的方法立即建议扩展的MCT标度律有限的空间维度,并产生新的预测低于上临界尺寸为6的动态弛豫指数。

英文摘要:

We show that the relaxation dynamics near a glass transition with continuous ergodicity breaking can be endowed with a geometric interpretation based on percolation theory. At mean-field level this approach is consistent with the mode-coupling theory (MCT) of type-A liquid-glass transitions and allows to disentangle the universal and nonuniversal contributions to MCT relaxation exponents. Scaling predictions for the time correlation function are successfully tested in the F12 schematic model and facilitated spin systems on a Bethe lattice. Our approach immediately suggests the extension of MCT scaling laws to finite spatial dimensions and yields new predictions for dynamic relaxation exponents below an upper critical dimension of 6.

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