On the approach to equilibrium of a Hamiltonian chain of anharmonic oscillators
Dipartimento di Fisica, Università La Sapienza,
INFN Sezione di Roma I, Piazzale Aldo Moro 2, 00185 Roma, Italy
Accepted: 26 September 1997
In this note we study the approach to equilibrium of a chain of anharmonic oscillators. We find indications that a sufficiently large system always relaxes to the usual equilibrium distribution. There is no sign of an ergodicity threshold. The time to arrive to equilibrium diverges when , g being the anharmonicity.
PACS: 05.20.Dd – Kinetic theory / 05.70.Ln – Nonequilibrium thermodynamics, irreversible processes / 63.20.Ry – Anharmonic lattice modes
© EDP Sciences, 1997