Physics – General Physics
Scientific paper
2012-04-13
Physics
General Physics
10 pages, 10 figures. arXiv admin note: text overlap with arXiv:1109.1481, arXiv:1102.2758
Scientific paper
In this work we investigate the background dynamics when dark energy is coupled to dark matter with a suitable interaction in the universe described by Loop quantum cosmology. Dark energy in the form of Generalised Cosmic Chaplygin gas is considered. A suitable interaction between dark energy and dark matter is taken into account in order to at least alleviate (if not solve) the cosmic coincidence problem. The dynamical system of equations is solved numerically and a stable scaling solution is obtained. A significant attempt towards the solution of the cosmic coincidence problem is taken. The statefinder parameters are also calculated to classify the dark energy model. Graphs and phase diagrams are drawn to study the variations of these parameters. It is seen that the background dynamics of Generalised Cosmic Chaplygin gas is completely consistent with the notion of an accelerated expansion in the late universe. From the graphs, generalised cosmic Chaplygin gas is identified as a dark fluid with a lesser negative pressure compared to Modified Chaplygin gas, thus supporting a 'No Big Rip' cosmology. It has also been shown that in this model the universe follows the power law form of expansion around the critical point, which is consistent with the known results. Future singularities that may be formed in this model as an ultimate fate of the universe has been studied in detail. It was found that the model is completely free from any types of future singularities.
Chowdhury Ratul
Rudra Prabir
No associations
LandOfFree
Interacting Generalised Cosmic Chaplygin gas in Loop quantum cosmology: A singularity free universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Interacting Generalised Cosmic Chaplygin gas in Loop quantum cosmology: A singularity free universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interacting Generalised Cosmic Chaplygin gas in Loop quantum cosmology: A singularity free universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-144785