APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Yin Li (CCA, Flatiron Institute) and Yueying Ni (CMU)
Title: Super-resolution cosmological simulations with deep learning
Date (JST): Thu, May 13, 2021, 11:00 - 12:00
Place: Zoom
Abstract: Cosmological simulations are indispensable for understanding our Universe. The large dynamic range incurs large computational costs, demanding sacrifice of either resolution or size, and often both. We build a deep neural network to enhance low-resolution dark matter simulations, generating super-resolution realizations that agree remarkably well with authentic high-resolution counterparts on various statistics, and are orders-of-magnitude faster. It readily applies to larger volumes, and generalizes to rare objects not present in the training data. We show that deep learning and cosmological simulations can be a powerful combination, to model the structure formation of our Universe over its full dynamic range.

The talk is based on our recent works: