Thermodynamic parametrization of dark energy

Understand

We propose a model-independent parametrization of dark energy motivated by thermodynamics.

• To this aim, we consider Pad\'e polynomials to reconstruct the form of deceleration parameter adequate to describe different epochs of cosmic history and divergence-free in the far future.
• The proposed scenario also fulfills the demand of structure formation and contains the $\Lambda$CDM model as a limiting case.
• Thus, a numerical analysis at both background and perturbation levels is performed through the Markov Chain Monte Carlo method in view of the most recent cosmic data.