Ratio of viscosity to entropy density in a strongly coupled one-component plasma

Details Ratio of viscosity to entropy density in a strongly coupled one-component plasma Ratio of viscosity to entropy density in a strongly coupled one-component plasma

2008-03-31

arxiv.org/abs/0803.4407v2

Europhys.Lett.82:65001,2008

Physics

Plasma Physics

5 pages, revised version to be published in Europhysics Letters

Scientific paper

10.1209/0295-5075/82/65001

String theoretical arguments led to the hypothesis that the ratio of viscosity to entropy of any physical system has a lower bound. Strongly coupled systems usually have a small viscosity compared to weakly coupled plasmas in which the viscosity is proportional to the mean free path. In the case of a one-component plasma the viscosity as a function of the coupling strength shows a minimum. Here we show that the ratio of viscosity to entropy of a strongly coupled one-component plasma is always above the lower bound predicted by string theory.

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