Expanding universes in the conformal frame of f(R)gravity
Expanding universes in the conformal frame of f(R)gravity
The late time evolution of Friedmann-Robertson-Walker (FRW) models with a perfect fluid matter source is studied in the conformal frame of $f(R) $ gravity. We assume that the corresponding scalar field, nonminimally coupled to matter, has an arbitrary non-negative potential function $V(\phi) $. We prove that equilibria corresponding to non-negative …