Abstract
A few different examples of Euclidean wormholes with AdS asymptotics are constructed. These are geometries which are completely regular, and are solutions of ten- or eleven-dimensional supergravity. We point out that such geometries are puzzling from the AdS/CFT point of view, and try to speculate on possible resolutions of this puzzle. A better understanding of the physics of these geometries could lead to interesting insights into the nature of quantum gravity and to some new interpretations of closed cosmologies. To cite this article: L. Maoz, C. R. Physique 6 (2005).
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