We show how Newtonian cosmological simulations can be employed to investigate the non-linear evolution of two particle species in a relativistic context. We discuss the application for massive neutrinos and other multi-species systems such as Cold Dark Matter (CDM) plus baryons or Warm Dark Matter (WDM). We propose a method that allows us to perform simulations including massive neutrinos and general relativistic effects at almost the same computational cost as ordinary CDM only N-body simulations, employing tailor-made initial conditions and a dictionary for the interpretation of the simulation output.
@article{arxiv.1807.03701,
title = {A new approach to cosmological structure formation with massive neutrinos},
author = {Christian Fidler and Alexander Kleinjohann and Thomas Tram and Cornelius Rampf and Kazuya Koyama},
journal= {arXiv preprint arXiv:1807.03701},
year = {2019}
}