Abstract
In this paper we construct a stringy embedding of the dark bubble model of an expanding 4D cosmology with the help of branes rotating in extra dimensions. The Universe rides a bubble which has nucleated in an unstable higher dimensional background. Our construction is therefore a string theoretical realization of Vilenkin's quantum cosmology. While the cosmological constant vanishes at lowest order, loop corrections predicted by the weak gravity conjecture can induce a phenomenologically viable value. The model predicts the existence of large extra dimensions compatible with observational constraints, and we note a possible connection with the dark dimension proposal.
| Original language | English |
|---|---|
| Article number | 026020 |
| Number of pages | 11 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 107 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 15 Jan 2023 |
| MoE publication type | A1 Journal article-refereed |
Funding
We would like to thank Miguel Montero and Ivano Basile for stimulating discussions. In addition, we would like to extend our gratitude to Rob Tielemans and Thomas van Riet, who contributed with invaluable ideas and enlightening discussions in the early stages of this work. The work of O. H. was supported by the Academy of Finland (Grant No. 330346) and the Ruth and Nils-Erik Stenbäck foundation. D. P. would like to thank the Centre for Interdisciplinary Mathematics (CIM) for financial support.
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