More on ghosts in DGP model
High Energy Physics - Theory
2008-11-26 v1 Astrophysics
General Relativity and Quantum Cosmology
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 Stueckelberg fields.
Keywords
Cite
@article{arxiv.hep-th/0512097,
title = {More on ghosts in DGP model},
author = {Dmitry Gorbunov and Kazuya Koyama and Sergei Sibiryakov},
journal= {arXiv preprint arXiv:hep-th/0512097},
year = {2008}
}
Comments
Revtex, 9 pages, no figures