AdS null deformations with inhomogeneities

Abstract

We study $AdS\times X$ null deformations arising as near horizon limits of D3-brane analogs of inhomogenous plane waves. Restricting to normalizable deformations for the $Ad{S}_5$ case, these generically correspond in the dual field theory to SYM states with lightcone momentum density $T_{++}$ varying spatially, the homogenous case studied in arXiv:1202.5935 [hep-th] corresponding to uniform $T_{++}$. All of these preserve some supersymmetry. Generically these inhomogenous solutions exhibit analogs of horizons in the interior where a timelike Killing vector becomes null. From the point of view of $x^{+}$-dimensional reduction, the circle pinches off on these horizon loci in the interior. We discuss similar inhomogenous solutions with asymptotically Lifshitz boundary conditions, as well as aspects of Lifshitz singularities in string constructions involving $AdS$ null deformations. We also briefly discuss holographic entanglement entropy for some of these.

Latex, 25pgs, v2: references, clarifications added, PRD version

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• Particle Number and 3D Schroedinger Holography
• On a lightlike limit of entanglement
• Notes on the holographic Lifshitz theory
• Notes on hyperscaling violating Lifshitz and shear diffusion
• Classical Unattainability of Extremality in non-BPS D-brane Systems
• Hyperscaling violating Lifshitz holography