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- W3201747856 abstract "In this paper, we study a cosmological model inspired in the axionic matter with two canonical scalar fields $phi_1$ and $phi_2$ interacting through a term added to its potential. Introducing novel dynamical variables, and a dimensionless time variable, the resulting dynamical system is studied. The main difficulties arising in the standard dynamical systems approach, where expansion normalized dynamical variables are usually adopted, are due to the oscillations entering the nonlinear system through the Klein-Gordon (KG) equations. This motivates the analysis of the oscillations using methods from the theory of averaging nonlinear dynamical systems. We prove that time-dependent systems, and their corresponding time-averaged versions, have the same late-time dynamics. Then, we study the time-averaged system using standard techniques of dynamical systems. We present numerical simulations as evidence of such behavior." @default.
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- W3201747856 date "2021-11-29" @default.
- W3201747856 modified "2023-10-16" @default.
- W3201747856 title "Time-averaging axion-like interacting scalar fields models." @default.
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