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(44) Production(s) de PITARD E.
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Injected Power Fluctuations in 1D dissipative systems : role of ballistic transport 
Auteur(s): Farago Jean, Pitard E.
(Article) Publié:
Physical Review E: Statistical, Nonlinear, And Soft Matter Physics, vol. 78 p.051114 (2008)
Texte intégral en Openaccess : 
Ref HAL: hal-00364937_v1
PMID 19113102
Ref Arxiv: 0810.5699
DOI: 10.1103/PhysRevE.78.051114
WoS: 000261213600019
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
3 Citations
Résumé: This paper is a generalization of the models considered in [J. Stat. Phys.128,1365 (2007)]. Using an analogy with free fermions, we compute exactly thelarge deviation function (ldf) of the energy injected up to time $t$ in aone-dimensional dissipative system of classical spins, where a drift isallowed. The dynamics are T=0 asymmetric Glauber dynamics driven out of rest byan injection mechanism, namely a Poissonian flipping of one spin. The driftinduces anisotropy in the system, making the model more comparable toexperimental systems with dissipative structures. We discuss the physicalcontent of the results, specifically the influence of the rate of the Poissoninjection process and the magnitude of the drift on the properties of the ldf.We also compare the results of this spin model to simple phenomenologicalmodels of energy injection (Poisson or Bernoulli processes of domain wallinjection). We show that many qualitative results of the spin model can beunderstood within this simplified framework.
Commentaires: 23 pages, 8 figures
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Thermodynamics of histories in kinetically contrained models
Auteur(s): Pitard E.
Conference: 50th Birthday Symposium (Cambridge, GB, 2007-12-07)
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Puissance injectée dans un système de spins unidimensionnel: un modéle exactement soluble
Auteur(s): Pitard E.
Conference: Journées de Physique Statistique, (Paris, FR, 2007-01-25)
Résumé: Résumé (à fournir)
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Investigation of $q$-dependent dynamical heterogeneity in a colloidal gel by x-ray photon correlation spectroscopy
Auteur(s): Trappe Veronique, Pitard E., Ramos L., Robert Aymeric, Bissig Hugo, Cipelletti L.
(Article) Publié:
Physical Review E: Statistical, Nonlinear, And Soft Matter Physics, vol. 76 p.051404 (2007)
Texte intégral en Openaccess :
Ref HAL: hal-00133792_v3
PMID 18233656
Ref Arxiv: cond-mat/0702646
DOI: 10.1103/PhysRevE.76.051404
WoS: 000251326100047
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
73 Citations
Résumé: We use time-resolved X-Photon Correlation Spectroscopy to investigate the slow dynamics of colloidal gels made of moderately attractive carbon black particles. We show that the slow dynamics is temporally heterogeneous and quantify its fluctuations by measuring the variance $\chi$ of the instantaneous intensity correlation function. The amplitude of dynamical fluctuations has a non-monotonic dependence on scattering vector $q$, in stark contrast with recent experiments on strongly attractive colloidal gels [Duri and Cipelletti, \textit{Europhys. Lett.} \textbf{76}, 972 (2006)]. We propose a simple scaling argument for the $q$-dependence of fluctuations in glassy systems that rationalizes these findings.
Commentaires: Final version published in PRE
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Dynamic first-order phase transition in kinetically constrained models of glasses
Auteur(s): Garrahan J. P., Jack R. L., Lecomte V., Pitard E., Van Duijvendijk K., Van Wijland F.
(Article) Publié:
Physical Review Letters, vol. 98 p.195702 (2007)
Texte intégral en Openaccess :
Ref HAL: hal-00364940_v1
PMID 17677633
Ref Arxiv: cond-mat/0701757
DOI: 10.1103/PhysRevLett.98.195702
WoS: 000246413200028
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
292 Citations
Résumé: We show that the dynamics of kinetically constrained models of glass formerstakes place at a first-order coexistence line between active and inactivedynamical phases. We prove this by computing the large-deviation functions ofsuitable space-time observables, such as the number of configuration changes ina trajectory. We present analytic results for dynamic facilitated models in amean-field approximation, and numerical results for the Fredrickson-Andersenmodel, the East model, and constrained lattice gases, in various dimensions.This dynamical first-order transition is generic in kinetically constrainedmodels, and we expect it to be present in systems with fully jammed states.
Commentaires: 4.1 pages, 3 figures
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Injected Power Fluctuations in 1D Dissipative Systems
Auteur(s): Farago Jean, Pitard E.
(Article) Publié:
Journal Of Statistical Physics, vol. 128 p.1365-1382 (2007)
Texte intégral en Openaccess :
Ref HAL: hal-00364939_v1
Ref Arxiv: cond-mat/0703430
DOI: 10.1007/s10955-007-9380-3
WoS: 000249406600007
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
11 Citations
Résumé: Using fermionic techniques, we compute exactly the large deviation function(ldf) of the time-integrated injected power in several one-dimensionaldissipative systems of classical spins. The dynamics are T=0 Glauber dynamicssupplemented by an injection mechanism, which is taken as a Poissonian flippingof one particular spin. We discuss the physical content of the results,specifically the influence of the rate of the Poisson process on the propertiesof the ldf.
Commentaires: 18 pages, 8 figures.
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Dissipative Stationary States : a 1D Solvable Model
Auteur(s): Pitard E.
Conference: Journées de Physique Statistique (Paris, France, FR, 2007-01-25)
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