Centre de Physique Théorique


Mercredi 17 juin 2020

15h00 – 16h30, Séminaire en ligne

Systems far from equilibrium ATTENTION : Modification

Kirone Mallick (IPhT, CEA Saclay)

Attention : Séminaire initialement programmé le 18 mars puis le 10 juin

Résumé :

Many natural systems can be maintained in a stationary state through the exchange of matter, energy or information with their surroundings. These various currents break time-reversal invariance, generating a continuous increase of entropy in the universe. Such systems are out of equilibrium and can not be described by the Laws of Thermodynamics, or by using the classical principles of statistical physics, `a la Gibbs-Boltzmann. One may even fear that seeking an under- lying microscopic theory is a vain pursuit : equilibria are all alike, whereas every system can be far from equilibrium in its own way.
In the last two decades, however, important advances in our understanding of non-equilibrium processes have been achieved. Concepts of rare events, large deviations, fluctuations relations and macroscopic fluctuations provide a unified framework with the emergence of some universal features. The objective of this colloquium is to review these new ideas in non-equilibrium statistical physics and to illustrate them by examples inspired from soft-condensed matter.