Chaplygin inspired inflation

We discuss chaotic inflation in the context of a phenomenological modification of gravity inspired by the Chaplygin gas equation of state. We find that all observational constraints can be satisfied provided that the Chaplygin scale and the inflaton mass are smaller than 6.9×10−3M and 4.7×10−6M, respectively, where M2≡(8πG)−1 is the reduced Planck mass.