Dynamics and nonequilibrium states in the Hamiltonian mean-field model: A closer look

摘要: We critically revisit the evidence for existence of quasistationary states in globally coupled XY (or Hamiltonian mean-field) model. A slow-relaxation regime at long times is clearly revealed by numerical realizations model, but no traces quasistationarity are found during earlier stages evolution. point out nonergodic properties this system short-time range, which makes a standard statistical description unsuitable. New aspects evolution regime, and energy distribution function final approach to equilibrium, disclosed.