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Evolution of Interacting Viscous Dark Energy Model in Einstein Cosmology |
| CHEN Ju-Hua1,2,3**, ZHOU Sheng1,2, WANG Yong-Jiu1,2
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1College of Physics and Information Science, Hunan Normal University, Changsha 410081
2Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081
3Department of Physics & Astronomy, University of Missouri, Columbia, MO 65211, USA
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| Cite this article: |
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CHEN Ju-Hua, ZHOU Sheng, WANG Yong-Jiu 2011 Chin. Phys. Lett. 28 029801 |
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Abstract We investigate the evolution of the viscous dark energy (DE) interacting with the dark matter (DM) in the Einstein cosmology model. By using the linearizing theory of the dynamical system, we find that, in our model, there exists a stable late time scaling solution which corresponds to the accelerating universe. We also find the unstable solution under some appropriate parameters. In order to alleviate the coincidence problem, some authors considered the effect of quantum correction due to the conform anomaly and the interacting dark energy with the dark matter. However, if we take into account the bulk viscosity of the cosmic fluid, the coincidence problem will be softened just like the interacting dark energy cosmology model. That is to say, both the non-perfect fluid model and the interacting the dark energy cosmic model can alleviate or soften the singularity of the universe.
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| Keywords:
98.80.Cq
98.80.-k
95.36.+x
04.60.Pp
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Received: 26 May 2010
Published: 30 January 2011
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| PACS: |
98.80.Cq
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(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))
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98.80.-k
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(Cosmology)
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95.36.+x
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(Dark energy)
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04.60.Pp
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(Loop quantum gravity, quantum geometry, spin foams)
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