Trace Anomaly Inflation in Brane Induced Gravity

Abstract

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.

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

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Cited by in corpus (5)

• Trace-anomaly driven inflation in $f(T)$ gravity and in minimal massive bigravity
• Trace-anomaly driven inflation in modified gravity and the BICEP2 result
• Anomaly Driven Cosmology: Big Boost Scenario and AdS/CFT Correspondence
• Braneworld non-minimal inflation with induced gravity
• Gravity and the Neutral Currents: Effective Interactions from the Trace Anomaly