Cosmological dynamics of scalar fields with O(N) symmetry

Details Cosmological dynamics of scalar fields with O(N) symmetry Cosmological dynamics of scalar fields with O(N) symmetry

2004-08-02

arxiv.org/abs/astro-ph/0408017v2

Class.Quant.Grav. 21 (2004) 4771-4779

Astronomy and Astrophysics

Astrophysics

9 pages, 4 figures; Replaced with the version to be published in Classical and Quantum Gravity. Reference added

Scientific paper

10.1088/0264-9381/21/21/001

In this paper, we study the cosmological dynamics of scalar fields with O(N) symmetry in general potentials. We compare the phase space of the dynamical systems of the quintessence and phantom and give the conditions for the existence of various attractors as well as their cosmological implications. We also show that the existence of tracking attractor in O(N) phantom models require the potential with $\Gamma<1/2$, which makes the models with exponential potential possess no tracking attractor.

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