Theoretical Priors and the Dark Energy Equation of State

Understand

We revisit the theoretical priors used for inferring Dark Energy (DE) parameters.

• Any DE model must have some form of a tracker mechanism such that it behaved as matter or radiation in the past.
• Otherwise, the model is fine-tuned.
• We construct a model-independent parametrization that takes this prior into account and allows for a relatively sudden transition between radiation/matter to DE behavior.