Proof of universality of electrical conductivity at finite chemical potential

Details Proof of universality of electrical conductivity at finite chemical potential Proof of universality of electrical conductivity at finite chemical potential

2010-11-15

arxiv.org/abs/1011.3499v2

JHEP 1102:073,2011

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, minor modification, Version published in JHEP

Scientific paper

10.1007/JHEP02(2011)073

It was proposed in arXiv:1008.2944 that, for certain gauge theories with gravity duals, electrical conductivity at finite chemical potential is universal. Here we provide a general proof that, when matter stress tensor satisfies a compact constraint, electrical conductivity is universal. We further elaborate our result with several conformal as well as non-conformal gauge theories. We also discuss how boundary conductivity and universal conductivity of stretched horizon are related.

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