A Quintom scenario with mixed kinetic terms
  We examine an extension of the quintom scenario of dark energy, in which a
canonical scalar field and a phantom field are coupled through a kinetic
interaction. We perform a phase space analysis and show that the kinetic
coupling gives rise to novel cosmological behaviour. In particular, we obtain
both quintessence-like and phantom-like late-time solutions, as well as
solutions that cross the phantom divide during the evolution of the universe.
