Szapudi István (University of Hawaii)

N-Body Simulations and Cosmological Statistics

Abstract: 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.

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