paper

Cohomogeneity-1 solutions in Einstein-Maxwell-dilaton gravity

arXiv:1702.05201 · doi:10.1103/PhysRevD.95.104008

Abstract

The field equations for Einstein-Maxwell-dilaton gravity in dimensions are reduced to an effective one-dimensional system under the influence of exponential potentials. Various cases where exact solutions can be found are explored. With this procedure, we present interesting solutions such as a one-parameter generalisation of the dilaton-Melvin spacetime and a three-parameter solution that interpolates between the Reissner-Nordström and Bertotti-Robinson solution. This procedure also allows simple, alternative derivations of known solutions such as the Lifshitz spacetime and the planar Anti-de Sitter naked singularity. In the latter case, the metric is cast in a simpler form which reveals the presence of an additional curvature singularity.

Typos corrected, 20 pages, no figures

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