(Quasi-) de Sitter solutions across dimensions and the TCC bound
Aug 30, 2022Citations per year
Abstract: (Springer)
In this work, we investigate the existence of string theory solutions with a d-dimensional (quasi-) de Sitter spacetime, for 3 ≤ d ≤ 10. Considering classical compactifications, we derive no-go theorems valid for general d. We use them to exclude (quasi-) de Sitter solutions for d ≥ 7. In addition, such solutions are found unlikely to exist in d = 6, 5. For each no-go theorem, we further compute the d-dependent parameter c of the swampland de Sitter conjecture, . Remarkably, the TCC bound is then perfectly satisfied for d ≥ 4, with several saturation cases. However, we observe a violation of this bound in d = 3. We finally comment on related proposals in the literature, on the swampland distance conjecture and its decay rate, and on the so-called accelerated expansion bound.Note:
- 49 pages; v3: minor modifications
- Flux Compactifications
- String and Brane Phenomenology
- Supergravity Models
- space-time: de Sitter
- expansion: acceleration
- string model: solution
- compactification
- saturation
- decay rate
References(73)
Figures(2)
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