Institute for Advanced Study Astrophysics Seminar

I will motivate current work in weak gravitational lensing with cosmic and astrophysical puzzles. The evolution of dark energy, the growth of structure and feedback from supermassive black holes are some of the debated questions. I will describe how higher order statistics can help address these questions. I will show results from the Dark Energy Survey and CMB measurements and show how three-point correlations improve our handle on systematic uncertainties and cosmology. I will also show highlights from machine learning methods, focusing on mass map reconstruction with diffusion models.