FM 4-2017; Versione 0; Versione finale cfr 2018

Author : Giovanni Gallavotti

Title:: Finite thermostats in classical and quantum nonequilibrium

Abstract: Models for studying systems in stationary states but out of equilibrium have often empirical nature and very often break the fundamental time reversal symmetry. Here a formal interpretation will be discussed of the widespread idea that, in any event, the particular friction model choice should not matter physically. The proposal is, quite generally, that for the same physical system a time reversible model should be possible. Examples about the Navier-Stokes equations are given.

Keywords: Fluids, Irreversibility, Reversibility, Friction, Nonequilibrium Ensembles, Navier-Stokes, Fluctuation Relation

Giovanni Gallavotti
INFN Fisica, Rutgers University e Accademia dei Lincei
Universita di Roma Sapienza, 00185 Roma, Italy