Coupled oscillators as models of phantom and scalar field cosmologies

Details Coupled oscillators as models of phantom and scalar field cosmologies Coupled oscillators as models of phantom and scalar field cosmologies

2004-04-17

arxiv.org/abs/gr-qc/0404078v1

Phys.Rev. D69 (2004) 123520

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, LaTeX, to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.69.123520

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.

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