More on ghosts in DGP model

Details More on ghosts in DGP model More on ghosts in DGP model

2005-12-08

arxiv.org/abs/hep-th/0512097v1

Phys.Rev.D73:044016,2006

Physics

High Energy Physics

High Energy Physics - Theory

Revtex, 9 pages, no figures

Scientific paper

10.1103/PhysRevD.73.044016

It is shown by an explicit calculation that the excitations about the self-accelerating cosmological solution of the Dvali--Gabadaze--Porrati model contain a ghost mode. This raises serious doubts about viability of this solution. Our analysis reveals the similarity between the quadratic theory for the perturbations around the self-accelerating Universe and an Abelian gauge model with two Stueckelberg fields.

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