Minimum Shear Viscosity over Entropy Density at Phase Transition? --- A Counterexample
High Energy Physics - Phenomenology
2011-06-28 v2 High Energy Physics - Lattice
Nuclear Experiment
Nuclear Theory
Abstract
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.
Keywords
Cite
@article{arxiv.1010.3119,
title = {Minimum Shear Viscosity over Entropy Density at Phase Transition? --- A Counterexample},
author = {Jiunn-Wei Chen and Chang-Tse Hsieh and Han-Hsin Lin},
journal= {arXiv preprint arXiv:1010.3119},
year = {2011}
}
Comments
10 pages, 4 figures