Abstract
We discuss phenomenological consequences of the recently introduced refinements of the de Sitter swampland conjecture, which constrains the first and the second derivative of the scalar potential in terms of two constants and . Contrary to the original de Sitter swampland conjecture, the refinement has no constraints on spontaneous breaking scenarios, such as the Higgs, the chiral symmetry breaking, and the QCD axion. However, the refinement still strongly constrains inflation models. While we can achieve sufficient number of e-foldings, single-field inflationary models have trouble reproducing the observed valued of density perturbations, when and are . We point out that this constraint can be evaded for example by curvaton scenarios, which typically leads to detectable non-Gaussianities. Our work can also be regarded as bottom-up constraints on the values of and .
- Received 22 October 2018
DOI:https://doi.org/10.1103/PhysRevD.99.083520
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society