2003/07/23 by A. Crisanti, A Crisanti, F Ritort · 5 citations
Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Theoretical and Computational Physics #Thermal properties of materials #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.1209/epl/i2003-10158-3
Latex file, 8 pages + 5 postscript figures
arxiv created 2003/07/23 · openalex publication_date 2004/04/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We consider heat exchange processes between non-equilibrium aging systems (in their activated regime) and the thermal bath in contact. We discuss a scenario where two different heat exchange processes concur in the overall heat dissipation: a stimulated fast process determined by the temperature of the bath and a spontaneous intermittent process determined by the fact that the system has been prepared in a non-equilibrium state. The latter is described by a probability distribution function (PDF) that has an exponential tail of width given by a parameter λ, and satisfies a fluctuation theorem (FT) governed by that parameter. The value of λ is proportional to the so-called effective temperature, thereby providing a practical way to experimentally measure it by analyzing the PDF of intermittent events.