Further refining the de Sitter swampland conjecture
  We propose an alternative refined de Sitter conjecture. It is given by a
natural condition on a combination of the first and second derivatives of the
scalar potential. We derive our conjecture in the same weak coupling,
semi-classical regime where the previous refined de Sitter conjecture was
derived, using the same tools together with a few more assumptions that we
discuss. We further test and constrain free parameters in our conjecture using
data points of a classical type IIA supergravity setup. Interestingly, our
conjecture easily accommodates slow-roll single field inflation with a concave
potential, favored by observations. The standard quintessence potential is in
tension with our new conjecture, and we thus propose a different type of
quintessence model.
