paper

On Lifshitz scaling and hyperscaling violation in string theory

arXiv:1202.5935 · doi:10.1103/PhysRevD.85.106006

Abstract

We explore string/M-theory constructions of holographic theories with Lifshitz scaling exponent and hyperscaling violation exponent , finding a range of -values. Some of these arise as effective metrics from dimensional reduction of certain kinds of null deformations of spacetimes appearing in the near horizon geometries of extremal D3-, M2- and M5-brane theories. The solution in particular gives rise to in (boundary) space dimensions. Other solutions arise as the IIA D2- and D4-brane solutions with appropriate null deformations, and we discuss the phase structure of these systems.

Latex, 15pgs, v2: references, minor clarifications added

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