STATISTICAL APPROACH TO FINITE SYSTEMS OF INTERACTING PARTICLES BASEDON THE STRUCTURE OF CHAOTIC EIGENSTATES

A novel approach to finite systems of interacting Fermi or Bose partic les is suggested. The conditions under which such systems can be stati stically described are analysed. It was, in particular, shown that eve n for few particles, the onset of thermalization is possible provided the interaction between particles is strong and complex enough.