Hydrodynamical instabilities in an expanding quark gluon plasma

Details Hydrodynamical instabilities in an expanding quark gluon plasma Hydrodynamical instabilities in an expanding quark gluon plasma

2003-06-12

arxiv.org/abs/nucl-th/0306041v2

J.Phys. G32 (2006) 179-188

Physics

Nuclear Physics

Nuclear Theory

7 pages, 4 figures

Scientific paper

10.1088/0954-3899/32/2/009

We study the mechanism responsible for the onset of instabilities in a chiral phase transition at nonzero temperature and baryon chemical potential. As a low-energy effective model, we consider an expanding relativistic plasma of quarks coupled to a chiral field, and obtain a phenomenological chiral hydrodynamics from a variational principle. Studying the dispersion relation for small fluctuations around equilibrium, we identify the role played by chiral waves and pressure waves in the generation of instabilities. We show that pressure modes become unstable earlier than chiral modes.

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