Vogel-Fulcher-Tammann-type diffusive slowdown in weakly perturbed granular media

被引：23

作者：

D'Anna, G ^{[1
]}

Gremaud, G ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Dept Phys, Inst Genie Atom, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.87.254302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the process by which a perturbed granular medium of millimetric-size particles reaches a "frozen" static configuration by decreasing perturbation intensity. The granular system is perturbed by isolated taps or by continuous vibrations. The granular process is observed by an immersed oscillator, which is used as a low-frequency "thermometer." A diffusive noise is seen until well below the fluidization limit, and the approach to the frozen configuration arises according to a modified Vogel-Fulcher-Tanunann (VFT) behavior. As a function of an empirical control parameter with unit of time one recovers a standard VFT form.

引用

页码：254302 / 254302

页数：4

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