Droplet Nucleation and Domain Wall Motion in a Bounded Interval

Details Droplet Nucleation and Domain Wall Motion in a Bounded Interval Droplet Nucleation and Domain Wall Motion in a Bounded Interval

2001-08-14

arxiv.org/abs/cond-mat/0108217v1

Phys.Rev.Lett. 87 (2001) 270601

Physics

Condensed Matter

Statistical Mechanics

REVTeX, 4 pages, 3 Postscript figures

Scientific paper

10.1103/PhysRevLett.87.270601

We study a spatially extended model of noise-induced magnetization reversal: a classical Ginzburg-Landau theory, restricted to a bounded interval and perturbed by weak spatiotemporal noise. We compute the activation barrier and Kramers prefactor. As the interval length increases, a transition between activation regimes occurs, at which the prefactor diverges. We relate this to transitions that occur in low-temperature quantum field theory.

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