Trace Anomaly Inflation in Brane Induced Gravity

Details Trace Anomaly Inflation in Brane Induced Gravity Trace Anomaly Inflation in Brane Induced Gravity

2007-08-08

arxiv.org/abs/0708.1052v4

JCAP0805:012,2008

Physics

High Energy Physics

High Energy Physics - Theory

15 pages; minor rephrasing of a few sentences (to appear in JCAP)

Scientific paper

10.1088/1475-7516/2008/05/012

In the present letter we find that Starobinsky's inflationary solution is also valid in the Dvali-Gabadadze-Porrati (DGP) model where a 3-brane is embedded in 5-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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