More on ghosts in the Dvali-Gabadaze-Porrati model

D. Gorbunov, Kazuya Koyama, S. Sibiryakov

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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
Original languageEnglish
Pages (from-to)044016
Number of pages1
JournalPhysical Review D
Issue number4
Publication statusPublished - 14 Feb 2006


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