Effective Temperature in a Colloidal Glass

Details Effective Temperature in a Colloidal Glass Effective Temperature in a Colloidal Glass

2008-08-31

arxiv.org/abs/0809.0136v1

Phylosophical Magazine 33, 88 (2008) 4205

Physics

Condensed Matter

Statistical Mechanics

to be published in Philosophical Magazine

Scientific paper

10.1080/14786430802459537

We study the Brownian motion of particles trapped by optical tweezers inside a colloidal glass (Laponite) during the sol-gel transition. We use two methods based on passive rheology to extract the effective temperature from the fluctuations of the Brownian particles. All of them give a temperature that, within experimental errors, is equal to the heat bath temperature. Several interesting features concerning the statistical properties and the long time correlations of the particles are observed during the transition.

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