After a decade and a half of research motivated by the accelerating universe, theory and
experiment have reached a certain level of maturity. The development of theoretical models …

We review recent progress in massive gravity. We start by showing how different theories of
massive gravity emerge from a higher-dimensional theory of general relativity, leading to the …

This review is dedicated to recent progress in the field of classical, interacting, massive spin-
2 theories, with a focus on ghost-free bimetric theory. We will outline its history and its …

A bstract We study the background cosmology of the ghost-free, bimetric theory of gravity.
We perform an extensive statistical analysis of the model using both frequentist and …

If the graviton is the only high spin particle present during inflation, then the form of the
observable tensor three-point function is fixed by de Sitter symmetry at leading order in slow …

We provide further details on a recent proposal addressing the nature of the dark sectors in
cosmology and demonstrate that all current observations related to Dark Matter can be …

A bstract In this paper, we study the effective action, the mass spectrum and the first law of
entanglement entropy for a novel doubly holographic model called wedge holography. We …

A ghost-free theory of gravity with two dynamical metrics both coupled to matter is shown to
be consistent and viable. Its cosmological implications are studied, and the models, in …

We write down the teleparallel equivalent to Hassan–Rosen bigravity, which is written using
a torsionful but curvature-free connection. The theories only differ by a boundary term. The …

Nonlinear partially massless (PM) gravity, if it exists, is a theory of massive gravity in which
the graviton has four propagating degrees of freedom. In PM gravity, a scalar gauge …