Evolution of dark energy–dark matter-coupled expanding universe

作     者：Ti-Pei Li Mei Wu 

作者机构：Department of Physics Center for Astrophysics Tsinghua University Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences 

出 版 物：《Chinese Science Bulletin》 (科学通报(英文版))

年 卷 期：2014年第59卷第33期

页      面：4473-4477页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(11033003) 

主　　题：膨胀宇宙 暗能量 耦合 暗物质 演变 演化方程 动力学方程 吸引力 

摘      要：The present universe is dominated by repulsive dark energy. It is natural that the coupling between the dark energy and the attractive gravity has to be taken into account in studying the evolution of our universe. Here, we induce an evolution equation for dark energy–dark mattercoupled universe. The solutions of the dynamic equation provide a specific picture of cosmic evolution, which is well compatible with current observed evolution histories of both Hubble parameter and equation of state parameter of dark energy. In this picture, the already observed universe has undergone through three epochs—the epoch of equilibrium between gravity and dark energy at cosmological redshifts z [ 1, the phase transition epoch at z between about 0.5 and 1, and the present acceleration epoch starting from z 0:5. The expected matter-dominated deceleration epoch has not been seen yet, which requires future deep observations to look back upon more early universe.