title: Fluctuations in stationary nonequilibrium states of irreversible processes.
abstract: We formulate a dynamical fluctuation theory for stationary nonequilibrium states (SNS) which covers situations in a nonlinear hydrodynamic regime and is verified explicitly in stochastic models of interacting particles. In our theory a crucial role is played by the time reversed dynamics. Our results include the modification of the Onsager-Machlup theory in the SNS, a general Hamilton-Jacobi equation for the macroscopic entropy and a nonequilibrium, nonlinear fluctuation dissipation relation valid for a wide class of systems.
authors.affiliation: Dipartimento di Matematica, Università di Roma "La Sapienza," Piazza A. Moro 2, 00185 Roma, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Bertini
authors.forename: A
authors.initials: A
authors.lastname: De Sole
authors.forename: D
authors.initials: D
authors.lastname: Gabrielli
authors.forename: G
authors.initials: G
authors.lastname: Jona-Lasinio
authors.forename: C
authors.initials: C
authors.lastname: Landim