Abstract
A detailed comparative qualitative analysis is carried out for of the evolution of cosmological models based on a doublet of classical and phantom scalar fields with self-action. Just as in the case of a single scalar field, the phase space of such systems becomes multiply connected, there appear ranges of negative total effective energy unavailable for motion. A distinctive feature of the asymmetrical scalar doublet is the time dependence of prohibited ranges’ projections on the phase subspaces of each field.
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Ignat’ev, Y.G., Kokh, I.A. Peculiarities of Cosmological Models Based on a Nonlinear Asymmetric Scalar Doublet with Minimal Interaction. I. Qualitative Analysis. Gravit. Cosmol. 25, 24–36 (2019). https://doi.org/10.1134/S0202289319010055
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DOI: https://doi.org/10.1134/S0202289319010055