2001/12/14 by A. Travesset, Alex Travesset, R. A. White +3 · 1 citation
Economics, Econometrics and Finance · Physics and Astronomy · #Complex Systems and Time Series Analysis #NMR spectroscopy and applications #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.66.024430
27 Latex Pages, 14 eps figures
arxiv created 2001/12/14 · openalex publication_date 2002/07/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Crackling noise is observed in many disordered nonequilibrium systems in response to slowly changing external conditions. Examples range from Barkhausen noise in magnets to acoustic emission in martensites to earthquakes. Using the nonequilibrium random-field Ising model, we derive universal scaling predictions for the dependence of the associated power spectra on the disorder and field sweep rate, near an underlying disorder-induced nonequilibrium critical point. Our theory applies to certain systems in which the crackling noise results from an avalanchelike response to a (slowly) increasing external driving force, and is characterized by a broad power-law scaling regime of the power spectra. We compute the critical exponents and discuss the relevance of the results to experiments.