Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2008/05/012
Keywords
cosmology with extra dimensions; gravity; physics of the early universe
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In this paper we find that Starobinsky's inflationary solution is also valid in the Dvali-Gabadadze-Porrati (DGP) model where a 3-brane is embedded in five-dimensional Minkowski bulk. We show that such a solution is typically not supported by the self-accelerated branch of the model, giving therefore a natural selection of the conventional branch of solutions. In the absence of brane-induced Einstein-Hilbert term the SA branch is always selected out. We then study the linearized modes around all such de Sitter brane solutions finding perturbative stability for a range of parameters of the brane QFT.
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