Rapid phase transitions in primordial inflation with flat supergravity potentials

We demonstrate that the recently proposed naturally flat N=1 supergravity potentials not only provide a working primordial inflation scenario, but they also considerably facilitate the GUT phase transition. Towards the late stages of inflation, a rapid (second order) phase transition occurs naturally to the SU(3)xSU(2)xU(1) phase, thus gracefully and simultaneously ending the reign of the inflationary as well as GUT eras. (orig.)