Speaker
Prof.
Michele Maggiore
(Université de Géneve)
Description
A generic modified gravity theory, that generates a dynamical dark energy, will produce a different evolution at the background level, determined by the DE equation of state, as well as different cosmological perturbations with respect to LCDM. An effect that is completely general to modified gravity models is that the propagation of tensor perturbations is modified so that it emerges a notion of GW luminosity distance, different from the standard electromagnetic luminosity distance. We show that this effect is a powerful probe of modified gravity, that will be tested at LISA and at 3G GW detectors such as the Einstein Telescope.
