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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:09090011  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Generating scale-invariant fluctuations without inflation
Speaker(s): Joao Magueijo
Abstract: I describe a number of techniques that allow for the generation of (near) scale-invariant fluctuations in the early Universe without inflation or ekpyrosis. The basic ingredient is a decaying maximal speed of propagation, for which a Universal law is found. Connections are made with k-essence, the cuscaton, and the DBI action. However the simplest realizations result from bimetric theories and deformed dispersion relations and DSR. A number of implications to theories of quantum gravity are discussed.
Date: 24/09/2009 - 3:00 pm
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