Numerical test of the Edwards conjecture shows that all packings are equally probable at jamming

被引：0

作者：

Martiniani S. ^{[1
]}

Schrenk K.J. ^{[1
]}

Ramola K. ^{[2
]}

Chakraborty B. ^{[2
]}

Frenkel D. ^{[1
]}

机构：

[1] Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge

[2] Martin Fisher School of Physics, Brandeis University, Waltham, 02454, MA

来源：

Nature Physics | 2017年 / 13卷 / 9期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1038/nphys4168

中图分类号：

学科分类号：

摘要：

In the late 1980s, Sam Edwards proposed a possible statistical-mechanical framework to describe the properties of disordered granular materials. A key assumption underlying the theory was that all jammed packings are equally likely. In the intervening years it has never been possible to test this bold hypothesis directly. Here we present simulations that provide direct evidence that at the unjamming point, all packings of soft repulsive particles are equally likely, even though generically, jammed packings are not. Typically, jammed granular systems are observed precisely at the unjamming point since grains are not very compressible. Our results therefore support Edwards' original conjecture. We also present evidence that at unjamming the configurational entropy of the system is maximal. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.

引用

页码：848 / 851

页数：3