Slow-walking inflation
  We propose a new model of slow-roll inflation in string cosmology, based on
warped throat supergravity solutions displaying `walking' dynamics, i.e. the
coupling constant of the dual gauge theory slowly varies over a range of energy
scales. The features of the throat geometry are sourced by a rich field
content, given by the dilaton and RR and NS fluxes. By considering the motion
of a D3-brane probe in this geometry, we are able to analytically calculate the
brane potential in a physically interesting regime. This potential has an
inflection point: in its proximity we realize a model of inflation lasting
sixty e-foldings, and whose robust predictions are in agreement with current
observations. We are also able to interpret some of the most interesting
aspects of this scenario in terms of the properties of the QFT dual theory.
