2008/05/31 by Puxun Wu, Shuang Nan Zhang · 1 citation
Physics and Astronomy · #astro-ph #gr-qc
paper · pdf · doi:10.1088/1475-7516/2008/06/007
published as JCAP 0806:007,2008 · 15 pages, 8 figures, to appear in JCAP
arxiv created 2008/08/31 · arxiv updated 2011/07/13
The dynamics of interacting dark energy model in loop quantum cosmology (LQC) is studied in this paper. The dark energy has a constant equation of state wx and interacts with dark matter through a form 3cH(ρx+ρm). We find for quintessence model (wx>-1) the cosmological evolution in LQC is the same as that in classical Einstein cosmology; whereas for phantom dark energy (wx<-1), although there are the same critical points in LQC and classical Einstein cosmology, loop quantum effect reduces significantly the parameter spacetime (c, wx) required by stability. If parameters c and wx satisfy the conditions that the critical points are existent and stable, the universe will enter an era dominated by dark energy and dark matter with a constant energy ratio between them, and accelerate forever; otherwise it will enter an oscillatory regime. Comparing our results with the observations we find at 1σ confidence level the universe will accelerate forever.