On the transient Fluctuation Dissipation Theorem after a quench at a critical point

Abstract : The Modified Fluctuation Dissipation Theorem (MFDT) proposed by G. Verley et al. {\it (EPL 93, 10002, (2011))} for non equilibrium transient states is experimentally studied. We apply MFDT to the transient relaxation dynamics of the director of a liquid crystal after a quench close to the critical point of the Fr\'eedericksz transition (Ftr), which has several properties of a second order phase transition driven by an electric field. Although the standard Fluctuation Dissipation Theorem (FDT) is not satisfied, because the system is strongly out of equilibrium, the MFDT is perfectly verified during the transient in a system which is only partially described by Landau-Ginzburg (LG) equation, to which our observation are compared. The results can be useful in the study of material aging.
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Contributeur : Sergio Ciliberto <>
Soumis le : mercredi 17 juin 2015 - 17:16:32
Dernière modification le : jeudi 19 avril 2018 - 14:54:04
Document(s) archivé(s) le : mardi 25 avril 2017 - 11:15:53


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  • HAL Id : ensl-01164760, version 1
  • ARXIV : 1506.05444



Isaac Theurkauff, Aude Caussarieu, Artyom Petrosyan, Sergio Ciliberto. On the transient Fluctuation Dissipation Theorem after a quench at a critical point. 2015. 〈ensl-01164760〉



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