Dynamical Correlations as Origin of Nonextensive Entropy
  We present a simple and general argument showing that a class of dynamical correlations give rise to the so-called Tsallis nonextensive statistics. An example of a system having such a dynamics is given, exhibiting a non-Boltzmann energy distribution. A relation with prethermalization processes is discussed. 
T. Kodama, H.-T. Elze, C. E. Aguiar, T. Koide