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arXiv 0808.0709cond-mat.stat-mechcond-mat.dis-nn
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阿贝尔沙堆模型中雪崩的精细结构

Fine Structure of Avalanches in the Abelian Sandpile Model

Amir Abdolvand, Afshin Montakhab

摘要:

本文研究了线性尺寸为L的正方形格子上的二维阿贝尔沙堆模型。我们介绍了雪崩的精细结构的概念,并比较了雪崩和倾倒波的行为。我们表明,根据雪崩的精细结构的复杂程度,这是连续波的边界的复杂叠加的直接后果,雪崩分为两个不同的类别。我们建议缩放ansätz这些雪崩类型,并验证它们的数值。我们发现,虽然第一种类型的雪崩有一个简单的标度行为,第二(复杂)类型的特点是由雪崩大小相关的标度指数。这提供了一个框架,在该框架内,人们可以理解该模型中一致的缩放行为的失败。

英文摘要:

We study the two-dimensional Abelian Sandpile Model on a square lattice of linear size L. We introduce the notion of avalanche's fine structure and compare the behavior of avalanches and waves of toppling. We show that according to the degree of complexity in the fine structure of avalanches, which is a direct consequence of the intricate superposition of the boundaries of successive waves, avalanches fall into two different categories. We propose scaling ansätz for these avalanche types and verify them numerically. We find that while the first type of avalanches has a simple scaling behavior, the second (complex) type is characterized by an avalanche-size dependent scaling exponent. This provides a framework within which one can understand the failure of a consistent scaling behavior in this model.

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