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A new method has been proposed to evaluate the frictional force in the stationary state. This method is applied to the 1-dimensional model of clean surfaces. The kinetic frictional force is seen to depend on velocity in general, but the…

凝聚态物理 · 物理学 2009-10-22 Hiroshi Matsukawa , Hidetoshi Fukuyama

In this work we propose a two-dimensional extension of a previously defined one-dimensional version of a model of counterflowing particles, which considers an adapted Fermi-Dirac distribution to describe the transition probabilities. In…

软凝聚态物质 · 物理学 2020-09-02 E. V. Stock , R. da Silva

We study long-range interacting systems driven by external stochastic forces that act collectively on all the particles constituting the system. Such a scenario is frequently encountered in the context of plasmas, self-gravitating systems,…

统计力学 · 物理学 2013-12-03 Cesare Nardini , Shamik Gupta , Stefano Ruffo , Thierry Dauxois , Freddy Bouchet

We performed two-dimensional Molecular Dynamics simulations of cohesive disks under shear. The cohesion between the disks is added by the action of springs between very next neighbouring disks, modelling capillary forces. The geometry of…

软凝聚态物质 · 物理学 2007-05-23 N. Olivi-Tran , O. Pozo , N. Fraysse

In this work we extend recent study of the properties of the dense packing of "superdisks," by Y. Jiao, F. H. Stillinger and S. Torquato, Phys. Rev. Lett. 100, 245504 (2008), to the jammed state formed by these objects in random sequential…

统计力学 · 物理学 2010-10-12 Oleksandr Gromenko , Vladimir Privman

We study numerically the dynamics of two-dimensional vortex systems at zero temperature. In addition to pinned states and turbulent plastic flow, we find motion of vortices in rough channels along the direction of the driving force. In this…

凝聚态物理 · 物理学 2009-11-07 Hans Fangohr , Simon J. Cox , Peter A. J. de Groot

In this article we examine the dynamics of a colloidal particle driven by a modulated force over a sinusoidal optical potential energy landscape. Coupling between the competing frequencies of the modulated drive and that of particle motion…

The jamming of bi-disperse soft core disks is considered, using a variety of different protocols to produce the jammed state. In agreement with other works, we find that cooling and compression can lead to a broad range of jamming packing…

软凝聚态物质 · 物理学 2015-05-19 Daniel Vågberg , Peter Olsson , S. Teitel

Depinning and nonequilibrium transitions within sliding states in systems driven over quenched disorder arise across a wide spectrum of size scales ranging from atomic friction at the nanoscale, flux motion in type-II superconductors at the…

软凝聚态物质 · 物理学 2017-03-22 Cs. Sándor , A. Libál , C. Reichhardt , C. J. Olson Reichhardt

We study avalanche dynamics and local activity of forced-flow imbibition fronts in disordered media. We focus on the front dynamics as the mean velocity $\bar{v}$ of the interface is decreased and the pinning state is approached. Scaling…

统计力学 · 物理学 2010-03-05 Marc Pradas , Juan M. López , A. Hernández-Machado

Dense suspensions have previously been shown to produce a range of anomalous and gravity-defying behaviors when subjected to strong vibrations in the direction of gravity. These behaviors have previously been interpreted via analogies to…

软凝聚态物质 · 物理学 2022-06-29 Xingjian Hou , Joseph D. Peterson

We investigate numerically the clustering behavior of a system of phase oscillators with positive and negative couplings under a periodic external driving field with a bimodal distribution of driving phases. The phase distribution and the…

适应与自组织系统 · 物理学 2016-01-20 Jungzae Choi , M. Y. Choi , Moon Sung Chung , Byung-Gook Yoon

Using numerical simulations of a model disk system, we demonstrate that a machine learning generated order parameter can detect depinning transitions and different dynamic flow phases in systems driven far from equilibrium. We specifically…

统计力学 · 物理学 2024-04-23 D. McDermott , C. J. O. Reichhardt , C. Reichhardt

We investigate the existence of random close and random loose packing limits in two-dimensional packings of monodisperse hard disks. A statistical mechanics approach-- based on several approximations to predict the probability distribution…

软凝聚态物质 · 物理学 2010-11-18 Sam Meyer , Chaoming Song , Yuliang Jin , Kun Wang , Hernán A. Makse

We comprehensively study mechanical and vibrational properties of dimer packings in three-dimensional space with particular attention on critical scaling behaviors near the jamming transition. First, we confirm the dependence of the packing…

软凝聚态物质 · 物理学 2020-06-26 Kumpei Shiraishi , Hideyuki Mizuno , Atsushi Ikeda

We study the mean field equation of motion for driven domain walls in random media. We discuss the two cases of an external constant as well as an oscillating driving force. Our main focus lies on the critical dynamics close to the…

统计力学 · 物理学 2015-05-20 Friedmar Schütze , Thomas Nattermann

We study the absorbing state transition in particulate systems under spatially inhomogeneous driving using a modified random organization model. For smoothly varying driving the steady state results map onto the homogeneous absorbing state…

软凝聚态物质 · 物理学 2024-03-06 Bhanu Prasad Bhowmik , Christopher Ness

In order to develop a toy model for car's traffic in cities, in this paper we analyze, by means of numerical simulations, the transition among fluid regimes and a congested jammed phase of the flow of "kinetically constrained" hard spheres…

统计力学 · 物理学 2009-07-30 Adriano Barra , Gabriele Achler

Using high precision Monte Carlo simulations and a mean-field theory, we explore coarsening phenomena in a simple driven diffusive system. The model is reminiscent of vehicular traffic on a two-lane ring road. At sufficiently high density,…

统计力学 · 物理学 2009-11-11 I. T. Georgiev , B. Schmittmann , R. K. P. Zia

We consider the driven dynamics of Wigner crystals interacting with random disorder. Using numerical simulations, we find a rich variety of transport phenomena as a function of charge density, drive, and pinning strength. For weak pinning,…

无序系统与神经网络 · 物理学 2024-04-23 C. Reichhardt , C. J. O. Reichhardt