Stable contraction in Brans-Dicke cosmology

Understand

Contracting Universe (including bouncing models) solution generally depends on the initial conditions and hence possesses an extreme fine-tuning problem.

• In order to probe the stability of those solutions, in this work, we consider the Brans-Dicke theory with the power law potential in the presence of an additional barotropic matter in the homogeneous and isotropic background.
• We study the phase space and obtain critical points.
• We find that the quadratic potential is a special case where one of the solutions always gives rise to de-Sitter solution in all conformally connected frame.