Bulk viscosity in the nonlinear and anharmonic regime of strange quark matter

Details Bulk viscosity in the nonlinear and anharmonic regime of strange quark matter Bulk viscosity in the nonlinear and anharmonic regime of strange quark matter

2010-12-02

arxiv.org/abs/1012.0354v2

New J.Phys.13:045018,2011

Physics

Nuclear Physics

Nuclear Theory

14 pages, 6 figures; v2: Appendix B is omitted, a few new discussions added and some new references added

Scientific paper

10.1088/1367-2630/13/4/045018

The bulk viscosity of cold, dense three-flavor quark matter is studied as a function of temperature and the amplitude of density oscillations. The study is also extended to the case of two different types of anharmonic oscillations of density. We point several qualitative effects due to the anharmonicity, although quantitatively they appear to be relatively small. We also find that, in most regions of the parameter space, with the exception of the case of a very large amplitude of density oscillations (i.e. 10% and above), nonlinear effects and anharmonicity have a small effect on the interplay of the nonleptonic and semileptonic processes in the bulk viscosity.

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