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O(N) Quintessence with a Cosine-Type Potential |
| LI Xin-Zhou;LIU Dao-Jun;HAO Jian-Gang |
| Department of Physics, Shanghai Normal University,
Shanghai 200234
East China Institute for Theoretical Physics, Shanghai 200237
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| Cite this article: |
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LI Xin-Zhou, LIU Dao-Jun, HAO Jian-Gang 2002 Chin. Phys. Lett. 19 295-298 |
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Abstract We propose a quintessence model with a cosine-type potential, in which the scalar field Фa possesses an O(N) internal symmetry. The most prominent feature of this model is that it will not reduce to a cosmological constant even when |Фa| is spatially uniform and time-independent. Since different value of the potential parameter will lead to different cosmic microwave background anisotropies which may be detectable in the future satellite experiments, one can decide by observations whether the cosine-type quintessence consists of one scalar field or many fields with a symmetry constraint.
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| Keywords:
04.40.-b
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Published: 01 March 2002
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| PACS: |
04.40.-b
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(Self-gravitating systems; continuous media and classical fields in curved spacetime)
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