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13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

Linear perturbations in massive bigravity: formalism and cosmology

16 Dec 2015, 16:35
20m
Level 2, Room 14 (International Conference Centre Geneva)

Level 2, Room 14

International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva

Speaker

Mariele Motta (University of Geneva)

Description

In this talk I will discuss linear perturbations of dRGT massive bi-gravity with a single metric coupled to matter. First, I will introduce the formal derivation of the second order action for generic metrics. I will then use this result to identify stability bounds. Finally, I will discuss the linear perturbations on a FRW background, the cosmology of different branches, the number of degrees of freedom of the theory and the presence of instabilities.

Primary author

Mariele Motta (University of Geneva)

Presentation Materials