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

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  • Pottier, Noëlle

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.

Suggested Citation

  • Pottier, Noëlle, 2005. "Out of equilibrium generalized Stokes–Einstein relation: determination of the effective temperature of an aging medium," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 345(3), pages 472-484.
    • Handle: RePEc:eee:phsmap:v:345:y:2005:i:3:p:472-484
    DOI: 10.1016/j.physa.2004.07.019
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