Sylvain Joubaud, Baptiste Percier, Artem Petrosyan, Sergio Ciliberto
Published 2008-10-08, updated 2009-03-06Version 3
The orientation fluctuations of the director of a liquid crystal(LC) are measured after a quench near the Fr\'eedericksz transition, which is a second order transition driven by an electric field. We report experimental evidence that, because of the critical slowing down, the LC presents, after the quench, several properties of an aging system, such as power law scaling versus time of correlation and response functions. During this slow relaxation, a well defined effective temperature, much larger than the heat bath temperature, can be measured using the fluctuation dissipation relation.
Comments: to be published in PRL
Experimental evidence of non-Gaussian fluctuations near a critical point
Thermoacoustic effects in supercritical fluids near the critical point: Resonance, piston effect, and acoustic emission and reflection
The fidelity approach to the Hubbard model
![QR code for arXiv:0810.1392 [cond-mat.stat-mech]](http://oss.arxitics.com/images/favicon.svg)