1995/07/21 by Aurel Bulgac, Bulgac, Aurel, Giu Do Dang +3 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9507034
11 pages (Latex), 3 figures (uuencoded postscript)
arxiv created 1995/07/21 · arxiv updated 2009/12/01
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.