2008/07/11 by A. de la Macorra, F. Briscese, de la Macorra, A. +1
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.0807.1880
4 pages, no figures
arxiv created 2008/10/15 · arxiv updated 2009/12/01
We study a scalar phi field that unifies inflation and dark energy with a long period of a hot decelerating universe in between these two stages of inflation. A key feature is that the transition between the intermediate decelerated phase to the dark energy phase is related to a quantum regeneration of the scalar field phi instead to purely classical dynamics. The interaction Vint(phi,varphi) between phi and a second scalar field varphi allows not only for phi to decay at a high energy EI, even though phi does not oscillate around the minimum of its potential, but it also regenerates phi at an energy EBD ≃ EI2 close to present time. It predicts extra relativistic energy and an interacting dark energy which may account for a w<-1. In the model presented here we have EI ≃ 100 TeV and EBD ≃ 1 eV. The low value of the back decay energy EBD gives an explanation of the coincidence problem.