Coupled oscillators as models of phantom and scalar field cosmologies
- 28 June 2004
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 69 (12)
- https://doi.org/10.1103/physrevd.69.123520
Abstract
We study a toy model for phantom cosmology recently introduced in the literature and consisting of two oscillators, one of which carries negative kinetic energy. The results are compared with the exact phase space picture obtained for similar dynamical systems describing, respectively, a massive canonical scalar field conformally coupled to the spacetime curvature, and a conformally coupled massive phantom. Finally, the dynamical system describing exactly a minimally coupled phantom is studied and compared with the toy model.Comment: 18 pages, LaTeX, to appear in Physical ReviewKeywords
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