Criticality and correlated dynamics at the irreversibility transition in periodically driven colloidal suspensions Auteur(s): Tjhung E., Berthier L. (Article) Publié: Journal Of Statistical Mechanics: Theory And Experiment, vol. p.033501 (2016) Texte intégral en Openaccess : Ref HAL: hal-01294277_v1 Ref Arxiv: 1510.07916 DOI: 10.1088/1742-5468/2016/03/033501 WoS: 000375704700040 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 11 Citations Résumé: One possible framework to interpret the irreversibility transition observed in periodically driven colloidal suspensions is that of a non-equilibrium phase transition towards an absorbing reversible state at low amplitude of the driving force. We consider a simple numerical model for driven suspensions which allows us to characterize in great detail a large body of physical observables that can be experimentally determined to assess the existence and universality class of such a non-equilibrium phase transition. Characterizing the behaviour of static and dynamic correlation functions both in real and Fourier space we determine in particular several critical exponents for our model, which take values that are in good agreement with the universality class of direct ed percolation. We also provide a detailed analysis of single-particle and collective dynamics of the system near the phase transition, which appear intermittent and spatially correlated over diverging timescales and lengthscales, and provide clear signatures of the underlying criticality. Commentaires: 27 pages, 12 figures; J. Stat. Mech. (in press) |