Kramers Escape Rate in Nonlinear Diffusive Media

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	Kramers Escape Rate in Nonlinear Diffusive Media
	Zhao JL(赵江林); Bao JD; Gong WP
刊名	Journal of Chemical Physics
	2006
通讯作者邮箱	ydqc@eyou.com
卷号	124 期号:2 页码:024112
ISSN号	0021-9606
通讯作者	Zhao, JL (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
中文摘要	In this paper, we study nonlinear Kramers problem by investigating overdamped systems ruled by the one-dimensional nonlinear Fokker-Planck equation. We obtain an analytic expression for the Kramers escape rate under quasistationary conditions by employing; In this paper, we study nonlinear Kramers problem by investigating overdamped systems ruled by the one-dimensional nonlinear Fokker-Planck equation. We obtain an analytic expression for the Kramers escape rate under quasistationary conditions by employing a metastable potential and its predictions are in excellent agreement with numerical simulations. The results exhibit the anomalies due to the nonlinearity in W that the escape rate grows with D and drops as mu becomes large at a fixed D. Indeed, particles in the subdiffusive media (mu>1) can escape over the barrier only when D is above a critical value, while this confinement does not exist in the superdiffusive media (mu < 1).
学科主题	力学
类目[WOS]	Physics, Atomic, Molecular & Chemical
研究领域[WOS]	Physics
关键词[WOS]	ANOMALOUS DIFFUSION ; DYNAMICS ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000234607700017
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16128]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Zhao JL,Bao JD,Gong WP. Kramers Escape Rate in Nonlinear Diffusive Media[J]. Journal of Chemical Physics,2006,124(2):024112.
APA	赵江林,Bao JD,&Gong WP.(2006).Kramers Escape Rate in Nonlinear Diffusive Media.Journal of Chemical Physics,124(2),024112.
MLA	赵江林,et al."Kramers Escape Rate in Nonlinear Diffusive Media".Journal of Chemical Physics 124.2(2006):024112.