Bottom-up holographic models for cosmology

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.

Minor typos corrected in Section 3, and Appendices A and C

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Cited by in corpus (8)

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• Holographic complexity: braneworld gravity versus the Lloyd bound
• Can one hear the shape of a wormhole?
• Cosmologies inside hyperbolic black holes
• Constraints from Entanglement Wedge Nesting for Holography at a Finite Cutoff
• Entanglement Entropy and Complexity of Multicomponent Universe from Holography