Viscosity Bound and Causality in Superfluid Plasma
High Energy Physics - Theory
2014-11-21 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
It was argued by Brigante et.al that the lower bound on the ratio of the shear viscosity to the entropy density in strongly coupled plasma is translated into microcausality violation in the dual gravitational description. Since transport properties of the system characterize its infrared dynamics, while the causality of the theory is determined by its ultraviolet behavior, the viscosity bound/microcausality link should not be applicable to theories that undergo low temperature phase transitions. We present an explicit model of AdS/CFT correspondence that confirms this fact.
Cite
@article{arxiv.1007.2963,
title = {Viscosity Bound and Causality in Superfluid Plasma},
author = {Alex Buchel and Sera Cremonini},
journal= {arXiv preprint arXiv:1007.2963},
year = {2014}
}
Comments
27 pages, 5 figures. References added, typos fixed