Quantum Dissipation

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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.
11 pages (Latex), 3 figures (uuencoded postscript)

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Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/82584

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/9507034
 http://arxiv.org/abs/nucl-th/9507034

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arXiv