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arxiv: hep-th/0609169 · v1 · pith:FPQJK6FBnew · submitted 2006-09-25 · ✦ hep-th

Mirage Cosmology on Unstable D3-Brane Universe

classification ✦ hep-th
keywords cosmologicalunstablebranebulkcomparisoncosmologycoupledd3-brane
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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.

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