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(327) Production(s) de BERTHIER L.
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Can the jamming transition be described using equilibrium statistical mechanics?
Auteur(s): Berthier L., Jacquin Hugo, Zamponi Francesco
(Article) Publié:
Journal Of Statistical Mechanics: Theory And Experiment, vol. p.P01004 (2011)
Texte intégral en Openaccess :
Ref HAL: hal-00553505_v1
Ref Arxiv: 1011.5637
DOI: 10.1088/1742-5468/2011/01/P01004
WoS: 000286629000007
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
5 Citations
Résumé: When materials such as foams or emulsions are compressed, they display solid behaviour above the so-called 'jamming' transition. Because compression is done out-of-equilibrium in the absence of thermal fluctuations, jamming appears as a new kind of a nonequilibrium phase transition. In this proceeding paper, we suggest that tools from equilibrium statistical mechanics can in fact be used to describe many specific features of the jamming transition. Our strategy is to introduce thermal fluctuations and use statistical mechanics to describe the complex phase behaviour of systems of soft repulsive particles, before sending temperature to zero at the end of the calculation. We show that currently available implementations of standard tools such as integral equations, mode-coupling theory, or replica calculations all break down at low temperature and large density, but we suggest that new analytical schemes can be developed to provide a fully microscopic, quantitative description of the jamming transition.
Commentaires: 8 pages, 6 figs. Talk presented at Statphys24 (July 2010, Cairns, Australia)
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Microscopic signatures of dynamic criticality close to a non-equilibrium phase transition
Auteur(s): Berthier L.
Conference: Congrés général de SFP (Paris, FR, 2009-07-06)
Résumé: Résumé (à fournir)
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Equilibrium and nonequilibrium gels
Auteur(s): Berthier L.
(Séminaires)
Theory of soft and biological matter Group (Oxford, GB), 2009-02-18 |
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Compressing random assemblies of spheres in and out of equilibrium
Auteur(s): Berthier L.
(Séminaires)
Department of Theoretical Physics (Oxford, GB), 2009-02-19
Résumé: Compressing random assemblies of spheres in and out of equilibrium
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Qu'est ce que le viellissement pour un physicien ?
Auteur(s): Berthier L.
Conférence invité: Journee de l'IXXI sur le vieillissement (, FR, 2009-10-22)
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Compressing random assemblies of spheres in and out of equilibrium
Auteur(s): Berthier L.
Conférence invité: Topology, Structure, and Dynamics in Non-Crystalline Solids (, FR, 2009-09-20)
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The glass transition of dense fluids of hard and compressible spheres
Auteur(s): Berthier L., Witten Thomas A.
(Article) Publié:
Physical Review E: Statistical, Nonlinear, And Soft Matter Physics, vol. 80 p.021502 (2009)
Texte intégral en Openaccess :
Ref HAL: hal-00522294_v1
PMID 19792128
Ref Arxiv: 0903.1934
DOI: 10.1103/PhysRevE.80.021502
WoS: 000269637800068
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
170 Citations
Résumé: We use computer simulations to study the glass transition of dense fluids made of polydisperse, repulsive spheres. For hard particles, we vary the volume fraction, phi, and use compressible particles to explore finite temperatures, T>0. In the hard sphere limit, our dynamic data show evidence of an avoided mode-coupling singularity near phi_{MCT} ~ 0.592, they are consistent with a divergence of equilibrium relaxation times occurring at phi_0 ~ 0.635, but they leave open the existence of a finite temperature singularity for compressible spheres at volume fraction phi > phi_0. Using direct measurements and a new scaling procedure, we estimate the equilibrium equation of state for the hard sphere metastable fluid up to phi_0, where pressure remains finite, suggesting that phi_0 corresponds to an ideal glass transition. We use non-equilibrium protocols to explore glassy states above phi_0 and establish the existence of multiple equations of state for the unequilibrated glass of hard spheres, all diverging at different densities in the range phi \in [0.642, 0.664]. Glassiness thus results in the existence of a continuum of densities where jamming transitions can occur.
Commentaires: 16 pages; 7 figures Journal: Phys. Rev. E 80, 021502 (2009)
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