Orateur
Description
LIGO, VIRGO and Kagra (just to name a few) represent outstanding feats of engineering that have launched us in a new era of gravitational-wave (GW) detection. Even so, we may wonder whether their sensitivity is enough to detect very high-frequency signals of beyond-Standard-Model origin, such as those sourced by primordial stochastic GW backgrounds, primordial black holes, or black hole superradiance. In this talk, I will argue that the sensitivity of present-day and near-future GW detectors will most likely prove insufficient in this regard. I will present the theoretical framework in which this question can be rigorously addressed and where to formally prove some heuristic expectations from the literature. I will also review these expectations and suggest that highly-controlled quantum resources will probably be needed to outrun the current sensitivity window of GW searches in the ultra-violet region.
