The stress-tensor part of thermal correlators develops complex-time singularities at exactly the locations where bulk geodesics reflect off the black hole singularity, and in Gauss-Bonnet holography ANEC saturation makes near-lightcone TT correlators vacuum-like.
Holographic p-wave superconductors from Gauss-Bonnet gravity
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abstract
We study the holographic p-wave superconductors in a five-dimensional Gauss-Bonnet gravity with an SU(2) Yang-Mills gauge field. In the probe approximation, we find that when the Gauss-Bonnet coefficient grows, the condensation of the vector field becomes harder, both the perpendicular and parallel components, with respect to the direction of the condensation, of the anisotropic conductivity decrease. We also study the mass of the quasi-particle excitations, the gap frequency and the DC conductivities of the p-wave superconductor. All of them depend on the Gauss-Bonnet coefficient. In addition we observe a strange behavior for the condensation and the relation between the gap frequency and the mass of quasi-particles when the Gauss-Bonnet coefficient is larger than 9/100, which is the upper bound for the Gauss-Bonnet coefficient from the causality of the dual field theory.
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Thermal Correlators and Black Holes: From Infinity to Singularity
The stress-tensor part of thermal correlators develops complex-time singularities at exactly the locations where bulk geodesics reflect off the black hole singularity, and in Gauss-Bonnet holography ANEC saturation makes near-lightcone TT correlators vacuum-like.