Holographic Superconductors in Quasi-topological Gravity

Details Holographic Superconductors in Quasi-topological Gravity Holographic Superconductors in Quasi-topological Gravity

2010-08-24

arxiv.org/abs/1008.4066v3

JHEP 1012:069,2010

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, 28 figures, accepted for publication in JHEP

Scientific paper

10.1007/JHEP12(2010)069

In this paper we study (3+1) dimensional holographic superconductors in quasi-topological gravity which is recently proposed by R. Myers {\it et.al.}. Through both analytical and numerical analysis, we find in general the condensation becomes harder with the increase of coupling parameters of higher curvature terms. In particular, comparing with those in ordinary Gauss-Bonnet gravity, we find that positive cubic corrections in quasi-topological gravity suppress the condensation while negative cubic terms make it easier. We also calculate the conductivity numerically for various coupling parameters. It turns out that the universal relation of $\omega_g/T_c\simeq 8$ is unstable and this ratio becomes larger with the increase of the coupling parameters. A brief discussion on the condensation from the CFT side is also presented.

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