On the Quintessence with Abelian and Non-abelian Symmetry

Details On the Quintessence with Abelian and Non-abelian Symmetry On the Quintessence with Abelian and Non-abelian Symmetry

2003-08-18

arxiv.org/abs/astro-ph/0308291v1

Int.J.Mod.Phys.A18:5921,2003; Int.J.Mod.Phys.A18:5921-5930,2003

Astronomy and Astrophysics

Astrophysics

15 pages, to be published in Int. J. Mod. Phys. A

Scientific paper

10.1142/S0217751X0301601X

We study the perturbations on both "radial" and "angular" components of the quintessence with an internal abelian and non-abelian symmetry. The properties of the perturbation on the "radial" component depend on the specific potential of the model and is similiar for both abelian and non-abelian case. We show that the consine-type potential is very interesting for the O(\textit{N}) quintessence model and also give a critical condition of instability for the potential. While the properties of perturbations on "angular" components depend on whether the internal symmetry is abelian or non-abelian, which we have discussed respectively. In the non-abelian case, the fluctuation of the "angular" component will increase rapidly with time while in the abelian case it will not.

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