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arXiv · hep-th/0411185

Pre-Big Bang Scenario on Self-T-Dual Bouncing Branes

Massimiliano Rinaldi·Paul Watts
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Abstract

We consider a new class of 5-dimensional dilatonic actions which are invariant under T-duality transformations along three compact coordinates, provided that an appropriate potential is chosen. We show that the invariance remains when we add a boundary term corresponding to a moving 3-brane, and we study the effects of the T-duality symmetry on the brane cosmological equations. We find that T-duality transformations in the bulk induce scale factor duality on the brane, together with a change of sign of the pressure of the brane cosmological matter. However, in a remarkable analogy with the Pre-Big Bang scenario, the cosmological equations are unchanged. Finally, we propose a model where the dual phases are connected through a scattering of the brane induced by an effective potential. We show how this model can realise a smooth, non-singular transition between a pre-Big Bang superinflationary Universe and a post-Big Bang accelerating Universe.

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Massimiliano Rinaldi, Paul Watts. 2005-03-15. Pre-Big Bang Scenario on Self-T-Dual Bouncing Branes. https://doi.org/10.1088/1475-7516%2F2005%2F03%2F006

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