Speaker
István Szapudi
(University of Hawaii)
Description
I will review two recent techniques for cosmological N-body simulations. The StePS simulations use a stereographic projection to compactify the universe and fit it into a finite computer. The resulting multiresolution technique is more efficient than standard zoom-in simulations and has isotropic gravity. Complementary simulations augment an existing simulation by minimizing cosmic variance by orders of magnitude without running thousands of additional realizations. These advanced non-linear dynamical models pair with novel statistical techniques such as sufficient statistics and indicator power spectra to extract more information from cosmological surveys, such as the recently launched Euclid.
