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Cosmological perturbations in massive gravity and bigravity

Defense Thèse de doctorat : Univ. Genève, 2016 - Sc. 4984 - 2016/09/07
Abstract This Thesis focus on two recent Lorentz-invariant theories which modify General Relativity by the introduction of an additional spin-2 field interacting with the space-time metric, the massive gravity theory and the bigravity (or bimetric gravity) theory. The main scopes of this Thesis are: first, to derive the full expression of the quadratic mass term for general perturbations at the level of the action both in the ghost-free massive gravity theory (with general reference metric) and in the ghost-free bimetric theory; and secondly, to investigate some cosmological applications of the linear perturbation theory to the case of bimetric gravity in order to see whether this theory can give rise to a viable description of our Universe, according to the current observational data. Part I of the Thesis is devoted to the first scope and part II to the second one.
URN: urn:nbn:ch:unige-968345
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GUARATO, Pietro. Cosmological perturbations in massive gravity and bigravity. Université de Genève. Thèse, 2016. doi: 10.13097/archive-ouverte/unige:96834 https://archive-ouverte.unige.ch/unige:96834

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Deposited on : 2017-09-18

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