More on ghosts in the Dvali-Gabadaze-Porrati model
- 14 February 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 73 (4), 044016
- https://doi.org/10.1103/physrevd.73.044016
Abstract
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 Stückelberg fields.Keywords
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