Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1995-07-21
Physics
Nuclear Physics
Nuclear Theory
11 pages (Latex), 3 figures (uuencoded postscript)
Scientific paper
We address the question of the microscopic origin of dissipation in collective motion of a quantum many--body system in the framework of a parametric random matrix approach to the intrinsic dynamics. We show that the fluctuation--dissipation theorem is generally violated and, moreover, energy diffusion has a markedly non--Gaussian character and the corresponding distribution has very long tails. Such features do not support a Langevin or Fokker--Planck approach to dissipation in collective nuclear motion.
Bulgac Aurel
Dang Giu Do
Kusnezov Dimitri
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