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Cosmological Dynamics of de Sitter Gravity |
| AO Xi-Chen**, LI Xin-Zhou, XI Ping
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Shanghai United Center for Astrophysics (SUCA), Shanghai Normal University, 100 Guilin Road, Shanghai 200234
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| Cite this article: |
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AO Xi-Chen, LI Xin-Zhou, XI Ping 2011 Chin. Phys. Lett. 28 040401 |
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Abstract A new cosmological model based on the de Sitter gravity is investigated by dynamical analysis and numerical discussions. Via some transformations, the evolution equations of this model can form an autonomous system with 8 physical critical points. Among these critical points there exist one positive attractor and one negative attractor. The positive attractor describes the asymptotic behavior of late-time universe, which indicates that the universe will enter the exponential expansion phase, finally. Some numerical calculations are also carried out, which convince us of this conclusion derived from the dynamical analysis.
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| Keywords:
04.50.Kd
95.30.Sf
98.80.Jk
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Received: 09 December 2010
Published: 29 March 2011
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| PACS: |
04.50.Kd
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(Modified theories of gravity)
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95.30.Sf
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(Relativity and gravitation)
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98.80.Jk
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(Mathematical and relativistic aspects of cosmology)
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