Assuming the Hubble parameter is a continuous and differentiable function of comoving time, we investigate necessary conditions for the quintessence to phantom phase transition in the quintom model. For power-law and exponential potential examples, we study the behavior of dynamical dark energy fields and the Hubble parameter near the transition time, and show that the phantom-divide line ω=-1 is crossed in these models.
No takes yet. Share an insight, caveat, or question.
Sadjadi et al. (2006) studied this question.