Quintessence Model and Observational Constraints
Abstract
The recent observations of type Ia supernovae strongly support that the universe is accelerating now and decelerated in the recent past. By assuming a general relation between the quintessence potential and the quintessence kinetic energy, a general relation is found between the quintessence energy density and the scale factor. The potential includes both the hyperbolic and the double exponential potentials. A detailed analysis of the transition from the deceleration phase to the acceleration phase is then performed. We show that the current constraints on the transition time, the equation of state and the energy density of the quintessence field are satisfied in the model.
Keywords
Cite
@article{arxiv.gr-qc/0203007,
title = {Quintessence Model and Observational Constraints},
author = {Yungui Gong},
journal= {arXiv preprint arXiv:gr-qc/0203007},
year = {2014}
}
Comments
update references,add acknowledgements and correct some errors, accepted for publication in class. and quant. grav