Constraints on single entity driven inflationary and radition eras
  We present a model that attempts to fuse the inflationary era and the subsequent radiation dominated era under a unified framework so as to provide a smooth transition between the two. The model is based on a modification of the generalized Chaplygin gas. We constrain the model observationally by mapping the primordial power spectrum of the scalar perturbations to the latest data of WMAP7. We compute as well the spectrum of the primordial gravitational waves as would be measured today. 
Mariam Bouhmadi-Lopez, Pisin Chen, Yen-Wei Liu
astro-ph.CO gr-qc