MERCREDI 27 MAI 2009 14 heures Salle Séminaire 5 Centre de Physique Théorique Marseille-Luminy Horia Cornean Aalborg Universitet (Danemark) Titre: Non-equilibrium steady states in the partition free approach Abstract: "Assume that we have a system composed of a number of leads and a small sample, at termal equilibrium. At t=0 we switch on a bias between the leads, which might depend on time for a finite time interval. We prove that the system attains a non-equilibrium steady state and compute the stationary charge current. Note that we do not restrict ourselves to linear response theory. We will also discuss the complementarity of our approach with the one of Jaksic-Pillet-Ruelle."