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.
(Self-gravitating systems; continuous media and classical fields in curved spacetime)
引用本文:
LI Xin-Zhou;LIU Dao-Jun;HAO Jian-Gang. O(N) Quintessence with a Cosine-Type Potential[J]. 中国物理快报, 2002, 19(3): 295-298.
LI Xin-Zhou, LIU Dao-Jun, HAO Jian-Gang. O(N) Quintessence with a Cosine-Type Potential. Chin. Phys. Lett., 2002, 19(3): 295-298.
2002, Vol. 19 
