Black-hole lattices and inhomogeneous dust: modelling the three-dimensional universe with numerical relativity
Eloisa Bentivegna (Albert Einstein Institute, Potsdam)

After an introduction to the motivation and current approaches to modelling inhomogeneities in cosmology, I will present numerical relativity as a complementary tool in this area. I will describe the state-of-the-art infrastructure used in numerical-relativity studies related to gravitational waves, and explain what extensions and caveats are needed when applying this infrastructure to cosmological spacetimes. I will discuss two examples of numerical spacetimes that have a cosmological relevance: the evolution of a regular black-hole lattice and that of a three-torus filled with an inhomogeneous pressureless fluid. I will conclude with an overview of the road ahead.