https://doi.org/10.1140/epjc/s10052-012-2035-9
Regular Article - Theoretical Physics
Phase-space analysis on interactions in dark energy models
1
College of Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China
2
Department of Astronomy, Beijing Normal University, Beijing, 100875, China
3
Department of Physics, Yantai University, Yantai, 264005, China
* e-mail: zhangyia@cqupt.edu.cn
Received:
1
February
2012
Revised:
5
May
2012
Published online:
7
June
2012
To alleviate the “cosmic triple coincidence” problem, we add two kinds of interacting term in scalar field models which make radiation, matter and dark energy causally connected. Specifically, the interacting term (
) is being used in dark energy models for the first time. By the phase-space analysis, the evolution of our universe is investigated. We find that the eigenvalues in the radiation dominated phases could be all positive and the interactions help alleviate the “cosmic triple coincidence” problem in quintessence model.
© Springer-Verlag / Società Italiana di Fisica, 2012
