A Tour from Small Scales of Inflation, Primordial Black Holes, GWs to BH spins and Light Particles
Abstract: In the first part of my talk, I will touch on the small scales of inflation via Primordial Black Holes and GWs. Further, I will discuss the axion-gauge coupling phenomenology in more detail for these small scales. I will also focus on how we can probe primordial features such as non-Gaussianity via stochastic GWs that will be probed by various interferometers. In the final part, I will discuss accreting and jetting BHs, and how we can infer their spin via multi-wavelength observations. Finally, I will show how BH spins can be used to probe the properties of ultra-light bosonic particles via superradiance.