The shrinking domain framework I: a new, faster, more efficient approach to cosmological simulations

Understand

The advent of the new generation of wide field galaxy surveys makes large N-body cosmological simulations a necessary evil.

• While the cosmological simulation codes have evolved a lot since the first calculations in the 80s, the computational requirements for generating data that is relevant for large surveys remain challenging.
• We propose an alternative approach that can speed up these simulations.
• The framework is based on the idea of reducing the size of the integration region following the lightcone of an observer at redshift zero and thus simulating only the parts of the Universe that can be observed.