4 papers
Analytic backreaction of a scalar wig on a Schwarzschild black hole
Marco de Cesare, Manuel Del Piano, Carlos A. R. Herdeiro
We analytically determine the leading backreaction of a spherically symmetric massive complex scalar quasi-bound state (with mass ) on a Schwarzschild black hole with (initial)…
Arrows of time in bouncing cosmologies
Marco de Cesare
Different approaches to quantum gravity, such as loop quantum cosmology and group field theory, predict the resolution of the initial cosmological singularity via a bounce: a regul…
Perturbations of bimetric gravity on most general spherically symmetric spacetimes
David Brizuela, Marco de Cesare, Araceli Soler Oficial
We present a formalism to study linear perturbations of bimetric gravity on any spherically symmetric background, including dynamical spacetimes. The setup is based on the Gerlach-…
Gravitational wave oscillations in bimetric cosmology
David Brizuela, Marco de Cesare, Araceli Soler Oficial
Unlike general relativity, in bimetric gravity linear gravitational waves do not evolve as free fields. In this theory there are two types of tensor perturbations, whose interactio…