paper

Mirage Cosmology on Unstable D3-Brane Universe

arXiv:hep-th/0609169 · doi:10.1088/1742-6596/53/1/048

Abstract

We study the geodesic motion of an unstable brane moving in a higher dimensional bulk spacetime. The tachyon which is coupled to a U(1) gauge field induces a non-trivial cosmological evolution. Interestingly enough, this system exhibits a much smoother initial cosmological singularity in comparison with former works.

6 pages. Talk at the RTN conference ``The Quest for Unification: Theory Confronts Experiment", Corfu, Greece, Sept, 11-18, 2005

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