Institute for Advanced Study
Fundamental physics from the nonlinear Universe
The cosmology community is running a large program of galaxy surveys over the next 10 years. Our goal is to map out the properties of dark energy as a function of time, measure the sum of neutrino masses, and study the origin of the Universe with unprecedented precision. A key limitation for these efforts is how to extract cosmological information from small scales that are affected by nonlinear dynamics. I will discuss how some aspects of this can be addressed by reconstructing the initial conditions of the Universe from galaxy catalogs, and by using cosmological information in the non-Gaussian tails of the galaxy distribution. I will also briefly discuss prospects for cross-correlating future galaxy surveys with CMB lensing measurements.