Speaker
Patrick Adolf
Description
The latest data release of the DESI collaboration shows an increasing preference for time-depending dark energy models compared to the $\Lambda$CDM model.
In our work, we construct a holographic dark energy model motivated by the work of Cohen, Kaplan and Nelson (CKN) which proposed to use the Hubble horizon as an IR cutoff and connect it to the UV cutoff of the theory.
We take the resulting dark energy model that is proportional to $H(z)^2$ and compare it to different data sets in both, the late-universe and early-universe. Depending on the data set used, we find a preference of up to $2.6\,\sigma$ over the $\Lambda$CDM model and discuss several extensions of this model to improve the stability and sensitivity to early-universe data.