Universal relations of transport coefficients from holography
High Energy Physics - Theory
2009-09-25 v2 High Energy Physics - Phenomenology
Abstract
We show that there are universal high-temperature relations for transport coefficients of plasmas described by a wide class of field theories with gravity duals. These theories can be viewed as strongly coupled large-Nc conformal field theories deformed by one or more relevant operators. The transport coefficients we study are the speed of sound and bulk viscosity, as well as the conductivity, diffusion coefficient, and charge susceptibility of probe U(1) charges. We show that the sound bound v_s^2 <= 1/3 is satisfied at high temperatures in these theories and also discuss bounds on the diffusion coefficient, the conductivity and the bulk viscosity.
Keywords
Cite
@article{arxiv.0905.2969,
title = {Universal relations of transport coefficients from holography},
author = {Aleksey Cherman and Abhinav Nellore},
journal= {arXiv preprint arXiv:0905.2969},
year = {2009}
}
Comments
9 pages, 3 figures. Added references, fixed typos, corrected discussion of expansion