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12 mars 2020: 1 événement


  • Séminaires Internes

    Jeudi 12 mars 11:00-12:00 - Eric Bertin

    [INTERNE] Breaking of energy equipartition and spatial correlations in out-of-equilibrium systems

    Résumé : Energy equipartition is a cornerstone of equilibrium statistical physics. For instance, the average kinetic energy per degree of freedom of a molecule is the same for translational and rotational motions. For (harmonic) interaction energies, equipartition of energy applies to extended modes like phonons, and not to the degrees of freedom of individual particles. Out of equilibrium, energy equipartition is in general broken, which may lead to enhanced spatial correlations. The formulation in terms of extended modes offers a natural framework to describe these phenomena. As an illustration, two driven systems of experimental relevance will be considered, an epithelial cell monolayer and an AFM cantilever heated by a laser beam.

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