Long-range correlations in Boltzmann-Langevin model |
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Authors: | Sakir Ayik |
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Affiliation: | 1. Department of Physics, Tennessee Technological University, Box 5051, 38505, Cookeville, TN, USA 2. Joint Institute for Heavy-Ion Research, 37831, Oak, Ridge, TN, USA
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Abstract: | The average phase-space density described by the Boltzmann-Langevin model can largely deviate from the one provided by the Boltzmann-Uhling-Uhlenbeck model, due to the non-linear evolution of density fluctuations. This aspect is investigated for long-wavelength, small density fluctuations in the framework of a memory incorporated Boltzmann-Langevin model. It is shown that the correlations associated with density fluctuations yield a collision term describing coupling between the collective vibrations and the single-particle degrees of freedom, which may play an important role in damping of collective motion in both the stable and unstable regions. |
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