Quintom evolution in power-law potentials

Understand

We investigate quintom evolution in power-law potentials.

• We extract the early-time, tracker solutions, under the assumption of matter domination.
• Additionally, we derive analytical solutions at intermediate times, that is at low redshifts, which is the period during the transition from matter to dark-energy domination.
• A comparison with exact evolution reveals that the tracker solutions are valid within 98% for z>1.5, while the intermediate ones are accurate within 98% up to z=0.5.