Title: Statistical mechanics of active matter
Julien Tailleur, Université Paris-Diderot

Active Matter encompasses systems in which individual units are able to dissipate energy to self propel, ranging from bacteria to birds through self-propelled phoretic colloids and vibrated grains. This injection of momentum at the microscopic scale drives active systems strongly out of thermal equilibrium, endowing them with a phenomenology much richer than that of their passive counterparts. In this talk I will present a number of interesting issues which have recently been discussed in the active matter community. I will describe how standard concepts of equilibrium thermodynamics like pressure fail in active fluids. I will also discuss emerging behaviors of active systems, from the existence of cohesive active matter in the absence of cohesive forces to the transition to collective motion.