Bottom-up holographic models for cosmology

In this note, we investigate some simple generalizations of a bottom-up holographic approach to cosmology introduced in arXiv:1810.10601. Our models utilize the Karch/Randall/Takayanagi ansatz for gravitational dual boundary conformal field theory, involving pure AdS gravity and an end-of-the-world brane. Following suggestion made arXiv:2102.05057, consider with additional interface brane bulk. We find that solutions viable cosmological interpretation exist only if our model is further generalized, example by including Einstein-Hilbert term ETW action. The physical validity such discussed from perspective effective theory.