Inflatonless Inflation

Details Inflatonless Inflation Inflatonless Inflation

2010-02-22

arxiv.org/abs/1002.4044v5

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, v5: more discussions to clarify some issues

Scientific paper

We consider a $4+N$ dimensional Einstein gravity coupled to a non-linear sigma model. This theory admits a solution in which the $N$ extra dimensions contract exponentially while the ordinary space expand exponentially. Physically, the non-linear sigma fields induce the dynamical compactification of the extra dimensions, which in turn drives inflation. No inflatons are required.

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