Vanishing Cosmological Constant via Gravitational S-Duality
نویسنده
چکیده
We study S-duality transformations that mix the graviton with various forms of matter. In the case of matter in the form of a 3-form field, the dual of an (A)dS space time – with arbitrary curvature – is seen to be flat Minkowski space time, if the 3-form field has vanishing field strength before the duality transformation. Then we show that the Schwarzschild metric can be obtained as a suitable contraction of the dual of a Taub-NUT-AdS metric, and that metrics describing FRW cosmologies can be obtained as duals of theories with matter in the form of torsion. A modified duality transformation rule for gravity, due to the inclusion of the 3-form field, is crucial for these results. LPT Orsay 04-101 October 2004 E-mail : [email protected] Unité Mixte de Recherche CNRS UMR 8627
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