Orateur
Description
The recent Baryon Acoustic Oscillation measurements from the Dark Energy Spectroscopic Instrument (DESI) reveal persistent tensions in modern cosmology, including hints of dynamical dark energy evolution and neutrino mass constraints so stringent they conflict with oscillation experiments. A fundamental challenge is that theoretically distinct models produce nearly indistinguishable expansion histories while differing in their underlying microphysics and gravitational couplings. Breaking model degeneracies requires combining multiple independent observational probes to distinguish among alternative dark energy and modified gravity theories.
In this talk, I will review how current cosmological tensions interconnect and present multi-probe strategies to address them. I will discuss constraints on alternative cosmological models in light of DESI results, and highlight synergies with future gravitational wave detectors.