Explore the application of numerical relativity in studying the early universe through this comprehensive lecture by David Garrison, Associate Professor and Chair of Physics at UHCL. Delve into the development of large-scale simulations that model dynamical processes in the early cosmos, incorporating interactions between dark matter, scalar perturbations, gravitational waves, magnetic fields, and turbulent plasma. Discover how GRMHD codes based on the Cactus framework are utilized to conduct these simulations, offering flexibility in choosing differencing methods at runtime. Gain insights into various aspects of cosmology, including the early universe, gravitational waves, general relativity, inflation, and plasma turbulence. Learn about gravitational wave detection techniques, numerical simulation methods, and the application of Einstein's equations in cosmological contexts. Examine specific tests and results that validate these simulations, providing a deeper understanding of the universe's early stages and evolution. Read more