The past and future dynamics of quintom dark energy models

Understand

We study the phase space of the quintom cosmologies for a class of exponential potentials.

• We combine normal forms expansions and the center manifold theory in order to describe the dynamics near equilibrium sets.
• Furthermore, we construct the unstable and center manifold of the massless scalar field cosmology motivated by the numerical results given in Lazkoz and Leon (Phys Lett B 638:303.
• arXiv:astro-ph/0602590, 2006).