Nonequilibrium properties of the one-dimensional hard-point gas system.
We discuss the stability properties of a one-dimensional hard-point gas. We study the decay of the Loschmidt echo which describes the stability of the motion under system perturbations. We show a universal behavior in the echo decay which is intimately connected to the linear dynamical instability of the motion. In particular, in spite of such a weak instability, the asymptotic decay follows a simple exponential law.
Casati
Giulio
G
Center for Nonlinear and Complex Systems, Universita' degli studi dell'Insubria, Via Valleggio, 11 22100 Como, Italy .
Prosen
Tomaz
T
Wang
Lei
L
Li
Baowen
B