Numerical Relativity as a tool for studying the Early Universe

TL;DR

This paper discusses using numerical relativity, specifically a GRMHD code, to simulate early universe dynamics including dark matter, gravitational waves, and magnetic fields, advancing cosmological modeling capabilities.

Contribution

It introduces a new large-scale GRMHD simulation framework for early universe cosmology using the Cactus platform.

Findings

Development of a flexible, multi-method GRMHD code

Simulation of complex early universe interactions

Testing on high-performance computing resources

Abstract

Numerical simulations are becoming a more effective tool for conducting detailed investigations into the evolution of our universe. In this article, we show how the framework of numerical relativity can be used for studying cosmological models. The author is working to develop a large-scale simulation of the dynamical processes in the early universe. These take into account interactions of dark matter, scalar perturbations, gravitational waves, magnetic fields and a turbulent plasma. The code described in this report is a GRMHD code based on the Cactus framework and is structured to utilize one of several different differencing methods chosen at run-time. It is being developed and tested on the University of Houston's Maxwell cluster.