Dynamical dark energy confronted with multiple CMB missions

Understand

The measurements of the cosmic microwave background (CMB) have played a significant role in understanding the nature of dark energy.

• In this article, we investigate the dynamics of the dark energy equation of state, utilizing high-precision CMB data from multiple experiments.
• We begin by examining the Chevallier-Polarski-Linder (CPL) parametrization, a commonly used and recognized framework for describing the dark energy equation of state.
• We then explore the general Exponential parametrization, which incorporates CPL as its first-order approximation, and extensions of this parametrization that incorporate nonlinear terms.