Braneworld effective action and origin of inflation

Details Braneworld effective action and origin of inflation Braneworld effective action and origin of inflation

2001-07-27

arxiv.org/abs/hep-th/0107244v3

Phys.Rev. D65 (2002) 062003

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, LaTeX, the effective action form factor is corrected for small separation between branes and new references are adde

Scientific paper

10.1103/PhysRevD.65.062003

We construct braneworld effective action in two brane Randall-Sundrum model and show that the radion mode plays the role of a scalar field localizing essentially nonlocal part of this action. Non-minimal curvature coupling of this field reflects the violation of AdS/CFT-correspondence for finite values of brane separation. Under small detuning of the brane tension from the Randall-Sundrum flat brane value, the radion mode can play the role of inflaton. Inflationary dynamics corresponds to branes moving apart in the field of repelling interbrane inflaton-radion potential and implies the existence acceleration stage caused by remnant cosmological constant at late (large brane separation) stages of evolution. We discuss the possibility of fixing initial conditions in this model within the concept of braneworld creation from the tunneling or no-boundary cosmological state, which formally replaces the conventional moduli stabilization mechanism.

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