Crackling noise

James P. Sethna (), Karin A. Dahmen () and Christopher R. Myers ()
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James P. Sethna: Laboratory of Atomic and Solid State Physics, Clark Hall, Cornell University
Karin A. Dahmen: Department of Physics
Christopher R. Myers: Cornell Theory Center, Frank H. T. Rhodes Hall, Cornell University

Nature, 2001, vol. 410, issue 6825, 242-250

Abstract: Abstract Crackling noise arises when a system responds to changing external conditions through discrete, impulsive events spanning a broad range of sizes. A wide variety of physical systems exhibiting crackling noise have been studied, from earthquakes on faults to paper crumpling. Because these systems exhibit regular behaviour over a huge range of sizes, their behaviour is likely to be independent of microscopic and macroscopic details, and progress can be made by the use of simple models. The fact that these models and real systems can share the same behaviour on many scales is called universality. We illustrate these ideas by using results for our model of crackling noise in magnets, explaining the use of the renormalization group and scaling collapses, and we highlight some continuing challenges in this still-evolving field.

Date: 2001
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DOI: 10.1038/35065675

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