2019/05/07 by Colgáin, Eoin Ó, Yavartanoo, Hossein
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.1905.02555
The de Sitter Swampland conjecture compels us to consider dark energy models where λ(ϕ) ≡ |∇ϕ V|/V is bounded below by a positive constant. Moreover, it has been argued for Quintessence models that the constant λ scenario is the least constrained. Here we demonstrate that increasing λ only exacerbates existing tension in the Hubble constant H0. The identification of dark energy models that both evade observational bounds and alleviate H0 tension constitutes a robust test for the Swampland program.