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Extra Dimensions and Vacuum Dark Energy Models |
| CHEN Chi-Yi1,2;SHEN You-Gen1,3,4 |
| 1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2Graduate School of the Chinese Academy of Sciences, Beijing 100039
3National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
4Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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CHEN Chi-Yi, SHEN You-Gen 2004 Chin. Phys. Lett. 21 2320-2322 |
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Abstract The role of vacuum energy or cosmological constant in cosmology is discussed in a kind of nontrivial higher-dimensional model. Under the framework of Einstein's gravity, we obtain the corresponding equations of motion and find that the cosmological constant and vacuum energy in the full regime does not drive its acceleration, but decelerates the expansion of the universe. The dimension of space is required to be n=3 if we regard vacuum energy or cosmological constant as the candidate to drive the accelerated expansion of the universe.
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| Keywords:
98.80.Cq
11.10.Kk
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Published: 01 November 2004
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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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11.10.Kk
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(Field theories in dimensions other than four)
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