Plumbing the Abyss: Black Ring Microstates

Details Plumbing the Abyss: Black Ring Microstates Plumbing the Abyss: Black Ring Microstates

2007-06-26

arxiv.org/abs/0706.3786v2

JHEP0807:019,2008

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, 4 figures

Scientific paper

10.1088/1126-6708/2008/07/019

We construct the first smooth, horizonless ``microstate geometries'' that have the same charges, dipole charges and angular momenta as a BPS black ring whose horizon is macroscopic. These solutions have exactly the same geometry as black rings, except that the usual infinite throat is smoothly capped off at a very large depth. If the solutions preserve a U(1)x U(1) isometry, then this depth is limited by flux quantization but if this symmetry is broken then the throat can be made arbitrarily deep by tuning classical, geometric moduli. Interpreting these ``abysses'' (smooth microstate geometries of arbitrary depth) from the point of view of the AdS-CFT correspondence suggests two remarkable alternatives: either stringy effects can eliminate very large regions of a smooth low-curvature supergravity solution, or the D1-D5-P CFT has quantum critical points. The existence of solutions whose depth depends on moduli also enables us to define ``entropy elevators,'' and these provide a new tool for studying the entropy of BPS and near-BPS black holes.

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