# An effective three-dimensional de Sitter cosmology in string theory

@inproceedings{Landgren2021AnET, title={An effective three-dimensional de Sitter cosmology in string theory}, author={Filip Landgren}, year={2021} }

Motivated by the lack of consensus on whether or not de Sitter (dS) lies in the Swampland, we use a recently developed braneworld construction and known Anti-de Sitter (AdS) vacua to compute an explicit effective dS cosmology in three dimensions. We consider a non-perturbative AdS4 vacuum decaying to another lower AdS4 vacuum via bubble-nucleation. We also consider the more speculative case where a dS4 decay to a Minkowski4. The Israel junction conditions are solved across the bubble and we…

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