3 papers
gr-qc2020
Cosmic Acceleration and Growth of Structure in Massive Gravity
Michael Kenna-Allison, A. Emir Gumrukcuoglu, Kazuya Koyama
We introduce a cosmological model in the framework of Generalised Massive Gravity. This theory is an extension of non-linear massive gravity with a broken translation symmetry in t…
hep-th2019
Stable Cosmology in Generalised Massive Gravity
Michael Kenna-Allison, A. Emir Gumrukcuoglu, Kazuya Koyama
We present a thorough analysis of the cosmological perturbations in Generalised Massive Gravity. This is an extension of de Rham-Gabadadze-Tolley theory where the translation invar…
hep-th2018
On the viability of bigravity cosmology
Michael Kenna-Allison, A. Emir Gumrukcuoglu, Kazuya Koyama
We revisit the question of viability of bigravity cosmology as a candidate for dark energy. In the context of the low energy limit model, where matter couples to a single metric, w…