Intermittency, aging and record fluctuations

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dc.creatorSibani, Paolo
dc.creatorJensen, Henrik Jeldtoft
dc.date2004-03-08
dc.date2004-12-03
dc.date.accessioned2026-07-07T02:56:50Z
dc.date.available2026-07-07T02:56:50Z
dc.descriptionAging in spin glasses is analyzed via the Probability Density Function (PDF) of the heat transfer between system and bath over a small time $δt$. The PDF contains a Gaussian part, describing reversible fluctuations, and an exponential tail caused by intermittent events. We find that the relative weight of these two parts depends, for fixed $δt$, on the ratio of the total sampling time to the age $t_w$. Fixing this ratio, the intensity of the intermittent events is proportional to $δt/t_w$ and independent of the temperature. The Gaussian part has a variance with the same temperature dependence as the variance of the equilibrium energy in a system with an exponential density of states. All these observations are explained assuming that, for any $t_w$, intermittent events are triggered by local energy fluctuations exceeding those previously occurred.
dc.description7 pages, 4 figs Final, extended version to appear in Europhysics Letter
dc.identifierhttps://arxiv.org/abs/cond-mat/0403212
dc.identifierhttp://arxiv.org/abs/cond-mat/0403212
dc.identifierEurophys.Lett., 69 (4), pp. 563-569 (2005)
dc.identifierdoi:10.1209/epl/i2004-10376-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23483
dc.subjectSoft Condensed Matter
dc.subjectStatistical Mechanics
dc.titleIntermittency, aging and record fluctuations
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