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arXiv 2103.07701cond-mat.stat-mechcond-mat.dis-nn
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弹性界面雪崩中的长程相互作用

Long-range interactions in the avalanches of elastic interfaces

Clément Le Priol

摘要:

无序系统受到缓慢增加的外部应力时,通常会产生一种突然的动力学反应,其特征是活动的爆发,称为雪崩,这是失衡相变的表现。本论文主要研究弹性界面在脱钉相变附近的动力学行为,特别是长程相互作用的影响。推导了局部速度场的关联函数的普适标度形式。它允许测试转换的普适性类以及交互的范围。我还研究了在存在远程相互作用的情况下形成的集群的统计数据,并展示了它与全球雪崩统计数据的关系。最后,我提出了分析进展的理解雪崩的空间结构内的平均场模型,布朗力模型。

英文摘要:

Disordered systems submitted to a slowly increasing external stress often reacts with a jerky dynamics characterized by bursts of activity, called avalanches, which are the manifestation of an out-of-equilibrium phase transition. This thesis focuses on the dynamics of elastic interfaces near the depinning transition, and more specially on the effect of long-range interactions. I derive the universal scaling form of the correlation functions of the local velocity field. It allows to test the universality class of the transition as well as the range of the interactions. I also study the statistics of the clusters that form in presence of long-range interactions and show how it relates to the statistics of the global avalanches. Finally I present analytical advances towards the understanding of the spatial structure of avalanches within a mean-field model, the Brownian force 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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