Minimum Shear Viscosity over Entropy Density at Phase Transition? --- A Counterexample

Details Minimum Shear Viscosity over Entropy Density at Phase Transition? --- A Counterexample Minimum Shear Viscosity over Entropy Density at Phase Transition? --- A Counterexample

2010-10-15

arxiv.org/abs/1010.3119v2

Phys.Lett.B701:327-331,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures

Scientific paper

10.1016/j.physletb.2011.05.066

The ratio eta/s, shear viscosity (eta) to entropy density (s), reaches its local minimum at the (second order) phase transition temperature in a wide class of systems. It was suspected that this behavior might be universal. However, a counterexample is found in a system of two weakly self-interacting real scalar fields with one of them condensing at low temperatures while the other remains in the symmetric phase. There is no interaction between the two fields. The resulting eta/s is monotonically decreasing in temperature despite the phase transition.

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