Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-12-14
Physics
High Energy Physics
High Energy Physics - Theory
26 pages, 11 figures, V3, Added discussion of non-tachyonic scalars, alterations to figures and text
Scientific paper
We study fully backreacting, Gauss-Bonnet (GB) holographic superconductors in 5 bulk spacetime dimensions. We explore the system's dependence on the scalar mass for both positive and negative GB coupling, $\alpha$. We find that when the mass approaches the Breitenlohner-Freedman (BF) bound and $\alpha\rightarrow L^2/4$ the effect of backreaction is to increase the critical temperature, $T_c$, of the system: the opposite of its effect in the rest of parameter space. We also find that reducing $\alpha$ below zero increases $T_c$ and that the effect of backreaction is diminished. We study the zero temperature limit, proving that this system does not permit regular solutions for a non-trivial, tachyonic scalar field and constrain possible solutions for fields with positive masses. We investigate singular, zero temperature solutions in the Einstein limit but find them to be incompatible with the concept of GB gravity being a perturbative expansion of Einstein gravity. We study the conductivity of the system, finding that the inclusion of backreaction hinders the development of poles in the conductivity that are associated with quasi-normal modes approaching the real axis from elsewhere in the complex plane.
No associations
LandOfFree
The Rich Structure of Gauss-Bonnet Holographic Superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Rich Structure of Gauss-Bonnet Holographic Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Rich Structure of Gauss-Bonnet Holographic Superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-180043