Dark energy, the swampland, and the equivalence principle

@article{Bruck2019DarkET,
  title={Dark energy, the swampland, and the equivalence principle},
  author={C. V. D. Bruck and Cameron C. Thomas},
  journal={Physical Review D},
  year={2019},
  volume={100}
}
It has recently been argued that string theory does not admit de Sitter vacua. This would imply that the current accelerated expansion of the universe is not driven by a cosmological constant (or vacuum energy) but by other means such as a quintessential scalar field. Such a scalar field is in general expected to couple to at least some matter species, such as dark matter. Cosmological observations already constrain such dark matter couplings strongly. We argue that there are a number of… Expand

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