2010

Phase-space of flat Friedmann-Robertson-Walker models with both a scalar field coupled to matter and radiation

Leon, Genly, Silveira, Pavel, Fadragas, Carlos R.

Understand

We investigate the phase-space of a flat FRW universe including both a scalar field, $\phi,$ coupled to matter, and radiation.

  • The model is inspired in scalar-tensor theories of gravity, and thus, related with $F(R)$ theories through conformal transformation.
  • The aim of the chapter is to extent several results to the more realistic situation when radiation is included in the cosmic budget particularly for studying the early time dynamics.
  • Under mild conditions on the potential we prove that the equilibrium points corresponding to the non-negative local minima for $V(\phi)$ are asymptotically stable.

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