Model-Independent Perspectives on Coupled Dark Energy and the Swampland

Understand

We present a general model-independent approach to study the coupled dark energy and the string Swampland criteria.

• We show how the dark sector interaction is degenerated with the equation of state of dark energy in the context of the expansion of the Universe.
• With priors for either of them, the dynamics of dark energy and the dark sector interactions can be reconstructed together with the bounds of the Swampland criteria.
• Combining cosmic chronometers, baryon acoustic oscillation (BAO), and Type Ia supernovae our results suggest a mild $1 \sigma$ significance of dark sector interactions at low redshift for the coupled quintessence.