On the cosmological implications of the string Swampland

  title={On the cosmological implications of the string Swampland},
  author={P. Agrawal and G. Obied and P. Steinhardt and C. Vafa},
  journal={Physics Letters B},
  • P. Agrawal, G. Obied, +1 author C. Vafa
  • Published 2018
  • Physics
  • Physics Letters B
  • Abstract We study constraints imposed by two proposed string Swampland criteria on cosmology. These criteria involve an upper bound on the range traversed by scalar fields as well as a lower bound on | ∇ ϕ V | / V when V > 0 . We find that inflationary models are generically in tension with these two criteria. Applying these same criteria to dark energy in the present epoch, we find that specific quintessence models can satisfy these bounds and, at the same time, satisfy current observational… CONTINUE READING

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