Constraints on cosmologies inside black holes

We study the construction of holographic models with closed FRW cosmologies on the worldvolume of a constant-tension brane inside a Schwarzschild-AdS black hole. In dimensions d > 2, having a smooth Euclidean solution where the brane does not self-intersect limits the brane tension to T < T*, preventing us from realising a separation of scales between the brane and bulk curvature scales. We show that adding interface branes to this model does not relax the condition on the brane tension.

Automated summary

Researchers found that in constructing closed FRW cosmology models, the requirement to avoid self-intersections limits the brane tension to T < T*, preventing the separation of scales between the brane and bulk curvature scales. Adding interface branes to the model does not change this condition.