O(N) quintessence

Details O(N) quintessence O(N) quintessence

2001-07-10

arxiv.org/abs/astro-ph/0107171v3

Class.Quant.Grav. 19 (2002) 6049-6058

Astronomy and Astrophysics

Astrophysics

9 pages, 1 figure, this updated version will appear in Class. Quantum Grav

Scientific paper

10.1088/0264-9381/19/23/311

We study a new class of quintessence models, in which the scalar field possesses a O(\textit{N}) internal symmetry. We give a critical condition of instability for the potential against Q ball formation. We find that the most widely used potentials of quintessence don't satisfy the above condition, and therefore the O(\textit{N}) quintessence with these potential will not lead to the Q ball formation. It is worth noting that O(\textit{N}) quintessence with cosine-type potential is especially interesting in that the angular contribution is not negligible.

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