PIRSA:13110093

BiGravity: from Cosmological Solutions to Dual Galileons

Fasiello, M. (2013). BiGravity: from Cosmological Solutions to Dual Galileons. Perimeter Institute. https://pirsa.org/13110093

Fasiello, Matteo. BiGravity: from Cosmological Solutions to Dual Galileons. Perimeter Institute, Nov. 26, 2013, https://pirsa.org/13110093 

          @misc{ pirsa_PIRSA:13110093,
            doi = {10.48660/13110093},
            url = {https://pirsa.org/13110093},
            author = {Fasiello, Matteo},
            keywords = {Cosmology},
            language = {en},
            title = {BiGravity: from Cosmological Solutions to Dual Galileons},
            publisher = {Perimeter Institute},
            year = {2013},
            month = {nov},
            note = {PIRSA:13110093 see, \url{https://pirsa.org}}
          }

Matteo Fasiello

University of Portsmouth

Talk number
PIRSA:13110093
Collection
Talk Type
Subject
Abstract
I will present Cosmological FRW Solutions in BiGravity Theories and discuss their stability. After deriving the stability bound, one realizes that in Bigravity (in contradistinction to the FRW massive gravity case) the tension between requirements stemming from stability and those set by observations is resolved. The stability bound can also be derived in the decoupling limit of Bigravity. In this context an intriguing duality between Galilean interactions has emerged.