Hyperbolic Inflation
arXiv:1010.6021 · doi:10.1103/PhysRevD.83.066009
Abstract
We propose a natural scenario for the cosmological inflation with the non-minimal coupling term invoking compact hyperbolic extra dimensions. Thanks to the unique mathematical properties of compact hyperbolic space, the large volume of extra dimensions, which provides a natural understanding of the proper size of couplings, does not necessarily accompany with the low Kaluza-Klein scale so that the model allows a single field inflation with a scale around GeV. The model fulfills all the observed data and predicts a sizable gravitational perturbation, r~0.003.
5 pages
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