More on ghosts in DGP model

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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 Stueckelberg fields.
Revtex, 9 pages, no figures

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High Energy Physics - Theory, Astrophysics, General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/196116

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/0512097
 http://arxiv.org/abs/hep-th/0512097
 Phys.Rev.D73:044016,2006
 doi:10.1103/PhysRevD.73.044016

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arXiv