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Exact Inflationary Solution to Nonminimally Coupled Scalar Field |
| WANG Wen-Fu1;YANG Shu-Zheng2 |
| 1Department of Industrial Automation, Southwest Petroleum Institute, Nanchong 637001
2Department of Physics, China West Normal University, Nanchong 637000 |
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| Cite this article: |
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WANG Wen-Fu, YANG Shu-Zheng 2005 Chin. Phys. Lett. 22 1296-1299 |
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Abstract We present a new exact inflationary solution to nonminimally coupled scalar field. The inflation is driven by the evolution of scalar field with inflation potential V(λ) =λ /4 ψ4 - 1/2m2 ψ 2 + V0. This includes the solution that behaves exponential inflation for ψ0 > ψ > ψend and then develops smoothly towards radiation-like evolution for ψ < ψend. The spectral index of the scalar density fluctuations, ns, is computed, and the result is consistent with the analysis of the Wilkinson-microwave anisotropy probe data. This model can lead to successful inflation with approx 10-7, rather than 10-13 reported previously.
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98.80.Cq
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Published: 01 May 2005
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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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