Cosmic expansion from spinning black holes

Understand

We examine how cosmological expansion arises in a universe containing a lattice of spinning black holes.

• We study averaged expansion properties as a function of fundamental properties of the black holes, including the bare mass of the black holes and black hole spin.
• We then explore how closely the expansion properties correspond to properties of a corresponding matter-dominated FLRW universe.
• As residual radiation present in the initial data decays, we find good agreement with a matter-dominated FLRW solution, and the effective density in the volume is well-described by the horizon mass of the black hole.