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Daniel Wesley (DAMTP, University of Cambridge)
Friday 20 June 2008, 13:00-14:00
Oxidised cosmic acceleration
- đ¤ Speaker: Daniel Wesley (DAMTP, University of Cambridge)
- đ Date & Time: Friday 20 June 2008, 13:00 - 14:00
- đ Venue: Pavilion B Potter Room (B1.19)
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David Seery
Abstract
I will describe new results concerning embedding accelerating cosmological epochs (inflationary or dark energy-dominated) in models with extra dimensions. With weak assumptions on the higher-dimensional theory, one can reverse-engineer its properties based on simple features of the four-dimensional cosmology. In a large family of models one can show that the null energy condition must be violated to achieve nearly de Sitter expansion. I will discuss the relation of these results to existing “no-go” theorems. I will also describe work in progress concerning observational connections, and some open problems.
Series This talk is part of the DAMTP Friday GR Seminar series.
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