Stringy realization of a small and positive cosmological constant in dark bubble cosmology
Nov 18, 2022
20 pages
Published in:
- Phys.Rev.D 107 (2023) 2, 026020
- Published: Jan 15, 2023
e-Print:
- 2211.10191 [hep-th]
DOI:
- 10.1103/PhysRevD.107.026020 (publication)
Report number:
- UUITP - 49/22,
- HIP-2022-29/TH
View in:
Citations per year
Abstract: (APS)
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.Note:
- 20 pages, 4 figures
- membrane model: rotation
- higher-dimensional
- bubble
- string
- cosmological constant
- cosmological model
- string model
- background
- quantum cosmology
- embedding
References(37)
Figures(4)
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- [6]
- [7]
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- [9]
- [10]
- [11]
- [12]
- [13]
- [14]
- [15]
- [16]
- [17]
- [18]
- [19]
- [20]
- [20]
- [21]
- [22]
- [23]
- [24]