The Benefits of Stress: Resolution of the Lifshitz Singularity
arXiv:1207.0171 · doi:10.1103/PhysRevD.86.106008
Abstract
Through the AdS/CFT correspondence, Lifshitz spacetimes describe field theories with dynamical scaling (). Although curvature invariants are small, the Lifshitz metric exhibits a null singularity in the IR with a large tidal force that excites string oscillator modes. However, Lifshitz is not a vacuum solution of the Einstein equations -- the metric is supported by nontrivial matter content which must be taken into account in analyzing the propagation of test objects. In this paper, we consider the interaction of a string with a D0-brane density in the IR which supports a class of UV-complete Lifshitz constructions. We show that string/D-brane scattering in the Regge limit slows the string significantly, preventing divergent mode production and resolving the would-be singularity in string propagation.
arXiv comment16 pages; v2: new references added
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