Publikace ÚTF

Dynamics and chaos in the unified scalar field cosmology. II. System in a finite box

Acquaviva, G. and Lukes-Gerakopoulos, G.

We revisit the global dynamics of unified dark matter cosmological models and analyze it in a new
dynamical system setting. In particular, by defining a suitable set of variables we obtain a bounded variable
space, a feature that allows a better control of the critical elements of the system. First, we give a
comprehensive cosmological interpretation of the critical points. Then, we turn our focus on particular
representative trajectories with physically motivated initial conditions studied in the first paper of the series,
and we discuss how the scale factor relates to the equation of state parameter.We review and complement these
results in the light of the new variable approach by discussing the issue of whether the system is chaotic or not.
journal:Phys. Rev. D
phys.rev.d.95.043525_acquaviva.lukes-gerakopoulos.pdf (1190.05 kB)

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