Cosmological evolution of quintessence with a sign-changing interaction in dark sector

Dark energy and dark matter are only indirectly measured though their gravitational effects.It is possibie that there is some direct,non-gravitational interaction between DE and DM,which can be used to solve（or,at least alleviate）several important theoretical problems.In the present work,by analysin...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2014-09, Vol.57 (9), p.1805-1808
Main Authors: Zhang, Ming, Sun, ChengYi, Yang, ZhanYing, Yue, RuiHong
Format: Article
Language:English
Subjects:
Astronomy
China
Classical and Continuum Physics
Cosmology
Dark energy
Dark matter
Dynamical systems
Evolution
Gravitational effects
Gravity effects
Observations and Techniques
Physics
Physics and Astronomy
Quintessence (cosmology)
动力系统
宇宙演化
宇宙观
引力作用
引力相互作用
暗物质
暗能量
进化过程
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Summary:Dark energy and dark matter are only indirectly measured though their gravitational effects.It is possibie that there is some direct,non-gravitational interaction between DE and DM,which can be used to solve（or,at least alleviate）several important theoretical problems.In the present work,by analysing the cosmological dynamical system with a dark-sector interaction which changes its sign during the cosmological evolution,we find a scaling attractor to help to alleviate the cosmic-coincidence problem.This result shows that this interaction can bring new features to the cosmology.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-014-5550-x