EFFECT OF NOISE ON FRONT PROPAGATION

被引：6

作者：

VALLS, OT ^{[1
]}

LUST, LM ^{[1
]}

机构：

[1] UNIV MINNESOTA,MINNESOTA SUPERCOMP INST,MINNEAPOLIS,MN 55455

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.44.4326

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the role of noise in the propagation of a front into an unstable medium, as described by a Langevin equation for a scalar field. We investigate the crossover that occurs between constant-velocity propagation at early times and diffusive behavior at late times. We show that the time at which this crossover occurs is strongly correlated with the growth of the local value of the order parameter in the unstable region ahead of the front. We discuss the implications of our results concerning the relevance of noise terms in nonequilibrium problems involving spatial inhomogeneities.

引用

页码：4326 / 4331

页数：6

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