Cosmologies inside hyperbolic black holes

Models with closed FRW cosmologies on the worldvolume of a constant-tension brane inside a black hole provide an interesting setup for studying cosmology holographically. However, in more than two worldvolume dimensions, there are limitations on such models with flat spatial slices. I show that these limitations can be avoided by considering instead hyperbolic slices. This also naturally makes contact with previous work on Euclidean wormholes.

Automated summary

Studying closed FRW cosmological models on the worldvolume of a constant-tension brane inside a black hole provides an interesting way to explore cosmology holographically. By considering hyperbolic slices, the limitations that arise in models with flat spatial slices in more than two dimensions can be overcome.