Out of equilibrium generalized Stokes–Einstein relation: determination of the effective temperature of an aging medium

Noëlle Pottier

Physica A: Statistical Mechanics and its Applications, 2005, vol. 345, issue 3, 472-484

Abstract: We analyze in detail how the anomalous drift and diffusion properties of a particle evolving in an aging medium can be interpreted in terms of an effective temperature of the medium. From an experimental point of view, independent measurements of the mean-square displacement and of the mobility of a particle immersed in an aging medium such as a colloidal glass give access to an out of equilibrium generalized Stokes–Einstein relation, from which the effective temperature of the medium can eventually be deduced. We illustrate the procedure on a simple model with power-law behaviors.

Keywords: Fluctuation phenomena; Random processes; Noise and Brownian motion; Stochastic processes (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:345:y:2005:i:3:p:472-484

DOI: 10.1016/j.physa.2004.07.019

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