Seminari del Dipartimento di Matematica

Seminario del 2008

Carlos Mejia-Monasterio, Istituto dei Sistemi Complessi, CNR, Firenze

Fluctuations in Nonequilibrium Statistical Mechanics

nell'ambito della serie: SEMINARI DI FISICA MATEMATICA

fisica matematica

The fluctuations in nonequilibrium systems are under intense theoretical and experimental investigation. Topical ``fluctuation relations'' describe symmetries of the statistical properties of certain observables, in a variety of models and phenomena. They have been derived in deterministic and, later, in stochastic frameworks. After presenting an introduction of the fluctuation theorems for the transient response and the steady state, we present and discuss recent exact results for the behavior of thermodynamic fluctuations out of equilibrium. The convergence properties of different thermodynamic and dynamic measures, as well as the physical mechanisms underlying this behavior, will also be discussed.