Abstract
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 the gravitational dual of a boundary conformal field theory, involving pure AdS gravity and an end-of-the-world brane. Following a suggestion made in arXiv:2102.05057, we consider models with an additional interface brane in the bulk. We find that solutions with a viable cosmological interpretation exist only if our model is further generalized, for example by including an Einstein-Hilbert term in the ETW brane action. The physical validity of such models is discussed from the perspective of the effective theory.
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Waddell, C. Bottom-up holographic models for cosmology. J. High Energ. Phys. 2022, 176 (2022). https://doi.org/10.1007/JHEP09(2022)176
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DOI: https://doi.org/10.1007/JHEP09(2022)176