Particles Sliding on a Fluctuating Surface: Phase Separation and Power Laws

Дата и время публикации : 2000-02-18T13:22:58Z

Авторы публикации и институты :
Dibyendu Das (Department of Theoretical Physics, Tata Institute of Fundamental Research, Mumbai, India)
Mustansir Barma (Department of Theoretical Physics, Tata Institute of Fundamental Research, Mumbai, India)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 5 pages, 5 Postscript figures
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: We study a system of hard-core particles sliding downwards on a fluctuating one-dimensional surface which is characterized by a dynamical exponent $z$. In numerical simulations, an initially random particle density is found to coarsen and obey scaling with a growing length scale $sim t^{1/z}$. The structure factor deviates from the Porod law in some cases. The steady state is unusual in that the density-segregation order parameter shows strong fluctuations. The two-point correlation function has a scaling form with a cusp at small argument which we relate to a power law distribution of particle cluster sizes. Exact results on a related model of surface depths provides insight into the origin of this behaviour.

Category: Physics