Fitting the DESI BAO Data with Dark Energy Driven by the Cohen-Kaplan-Nelson Bound

Understand

Gravity constrains the range of validity of quantum field theory.

• As has been pointed out by Cohen, Kaplan, and Nelson (CKN), such effects lead to interdependent ultraviolet (UV) and infrared (IR) cutoffs that may stabilize the dark energy of the universe against quantum corrections, if the IR cutoff is set by the Hubble horizon.
• As a consequence of the cosmic expansion, this argument implies a time-dependent dark energy density.
• In this paper we confront this idea with recent data from DESI BAO, Hubble and supernova measurements.