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GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Hauptvorträge Schwarze Löcher II
GR 14.2: Invited Talk
Thursday, March 1, 2012, 14:45–15:30, ZHG 002
Stable Wormhole Solutions in Dilatonic Einstein-Gauss-Bonnet Theory — •Panagiota Kanti1, Burkhard Kleihaus2, and Jutta Kunz2 — 1University of Ioannina, Physics Department, Division of Theoretical Physics, Ioannina, GR 45110, Greece — 2Institut fur Physik, Universitat Oldenburg, D-26111 Oldenburg, Germany
As is well-known, wormhole solutions arising in the context of General Relativity, are non-traversable: they are unstable under small perturbations, and their `throat' opens and closes so quickly that not even a light signal can pass through. In this talk, we present wormhole solutions that arise in the context of the four-dimensional dilatonic Einstein-Gauss-Bonnet theory, a simple gravitational theory that follows from superstring theory. These solutions have their throat kept open by a localised matter distribution that respects all energy conditions imposed by physics, and admit particle trajectories that start from one side of the wormhole spacetime and exit from the other. In addition, our solutions do not possess any horizons, are stable under small radial perturbations and their throat can be arbitrarily large. We discuss additional properties of these solutions such as their domain of existence, the generalised Smarr relation they satisfy and the magnitude of the acceleration and tidal forces that a traveler crossing the wormhole would feel.