Computational cosmology: A general relativistic approach

Numerical simulations of the large-scale formation of the Universe, which is largely governed by gravity, are traditionally based on Newton’s lawof gravitation. But general relativistic effects should be included to achieve a realistic cosmological framework that can be compared with the increasingly high-quality data from large cosmological surveys ). In Nature Physics, Julian Adamek et al. discuss the results of computer simulations of structure formation in the Universe. Their numerical code aims to solve Einstein’s field equations relative to the dynamics of cold collisionless matter, with a minimum set of physically motivated simplifying assumptions. Here we comment on this paper and discuss how to progress further in this direction.