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PIRSA:06110021

Generalized Modified Gravity Models: ghosts and dynamical bounds

De Felice, A. (2006). Generalized Modified Gravity Models: ghosts and dynamical bounds. Perimeter Institute. https://pirsa.org/06110021

Antonio De Felice Yukawa Institute for Theoretical Physics

Talk numberPIRSA:06110021
DOI10.48660/06110021
Collection
Talk Type Scientific Series
Subject

Abstract

Modified gravity models seem to have classical instabilities, ghosts degrees of freedom and superluminal modes. Besides these constraints new dynamical bounds have found to be typical of these models. The cosmological nature of all these constraints is discussed.