Comments on AdS2 solutions of D=11 Supergravity
Abstract
We study the supersymmetric solutions of 11-dimensional supergravity with a factor of AdS2 made of M2-branes. Such solutions can provide gravity duals of superconformal quantum mechanics, or through double Wick rotation, the generic bubbling geometry of M-theory which are 1/16-BPS. We show that, when the internal manifold is compact, it should take the form of a warped U(1)-fibration over an 8-dimensional Kahler space.
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