Droplet nucleation and domain wall motion in a bounded interval

Robert S. Maier, D. L. Stein

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Abstract

We study a spatially extended model of noise-induced magnetization reversal: a classical Ginzburg-Landau model, restricted to a bounded interval and perturbed by weak spatiotemporal noise. By adapting the Coleman-Langer approach to false vacuum decay, we determine the dependence of the activation barrier and Kramers rate prefactor on the interval length. As it increases, a transition between activation regimes occurs, at which the prefactor diverges. Similar transitions between activation regimes should occur in many other bistable, spatially extended classical models.

Original languageEnglish (US)
Pages (from-to)270601-270601-4
JournalPhysical review letters
Volume87
Issue number27
DOIs
StatePublished - Dec 31 2001

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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