Cosmological dynamics of scalar fields with O(N) symmetry
Aug, 20049 pages
Published in:
- Class.Quant.Grav. 21 (2004) 4771-4779
e-Print:
- astro-ph/0408017 [astro-ph]
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Abstract: (arXiv)
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 , which makes the models with exponential potential possess no tracking attractor.- 98.80.Es
- 98.80.Cq
- 04.40.-b
- field theory: scalar
- symmetry: O(N)
- dynamical system
- phantom
- phase space
- attractor
- numerical calculations
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