We show that constraints on scalar field potentials and towers of light massive states in asymptotic limits space (as posited by the de Sitter conjecture swampland distance conjecture, respectively) are correlated with prospects for defining observables expanding Friedmann-Robertson-Walker cosmologies. The observations a ``census taker'' an eternally inflating cosmology further related to quest...

We investigate the consequences of combining swampland conjectures with requirement asymptotic safety. To this end, we explore infrared regime asymptotically safe gravity in quadratic one-loop approximation, and identify hypersurface spanned by endpoints renormalization group trajectories. These comprise allowed values higher-derivative couplings, as well standard logarithmic form factors. dete...

We propose a new swampland conjecture stating that the limit of vanishing gravitino mass corresponds to massless an infinite tower states and consequent breakdown effective field theory. test our proposal in large classes models coming from compactification string theory four dimensions, where we identify Kaluza-Klein nature becoming light. point out general relation between abelian gauge coupl...

A bstract Compactifying the Standard Model (SM) on a circle may lead to AdS 3D vacua, depending character (Majorana or Dirac) and mass of lightest neutrino. It has been shown that, imposing Ooguri-Vafa conjecture that no stable non-SUSY vacua are consistent with Quantum Gravity, one can obtain conditions This result shortcoming it is in general sensitive UV structure theory. In present paper we...

A bstract We consider the cosmology obtained using scalar fields with a negative potential energy, such as employed to obtain an Ekpyrotic phase of contraction. Applying covariant entropy bound tower states dictated by distance conjecture, we find that relative slope | V ′|/| is bounded from below constant order one in Planck units. This consistent requirement slow also derive refined condition...