Work fluctuations in a nematic liquid crystal
Statistical Mechanics
2009-11-13 v1 Materials Science
Abstract
The orientation fluctuations of the director of a liquid crystal are measured, by a sensitive polarization interferometer, close to the Fr\'eedericksz transition, which is a second order transition driven by an electric field. Using mean field theory, we define the work injected into the system by a change of the electric field and we calibrate it using Fluctuation-Dissipation Theorem. We show that the work fluctuations satisfy the Transient Fluctuation Theorem. An analytical justification of this result is given. The open problems for the out of equilibrium case are finally discussed.
Cite
@article{arxiv.0810.1448,
title = {Work fluctuations in a nematic liquid crystal},
author = {Sylvain Joubaud and Guillaume Huillard and Artyom Petrosyan and Sergio Ciliberto},
journal= {arXiv preprint arXiv:0810.1448},
year = {2009}
}
Comments
to be published in JSTAT: theory and experiments