http://arxiv.org/abs/1812.10448
We discuss the cosmological implications of the string swampland conjectures for late-time cosmology, and test them against a wide range of state of the art cosmological observations. Tension between the refined de Sitter conjecture on the minimal slope or the curvature of the potential and observations, especially the Hubble constant, exists at a level of 4.5 sigma and 2.3 sigma, respectively. We also derive and constrain the relationship between cosmological observables and the scalar field excursion during the acceleration epoch, thereby testing the distance conjecture.
M. Raveri, W. Hu and S. Sethi
Thu, 27 Dec 18
3/80
Comments: 10 pages, 4 figures