A DESI universe with time-dependent dark energy is 119 Myr younger than a LambdaCDM universe

2025/04/04 by Cahill, Kevin
#FOS: Physical sciences #General Physics (physics.gen-ph)

paper · doi:10.48550/arxiv.2504.06290

Abstract

On the basis of their redshift and Lyman-alpha measurements, the Dark Energy Spectroscopic Instrument (DESI) collaboration suggest that dark energy varies with the scale factor a as ρ_de(a)= a^{-3(1 + w₀ + w_a)} e^{-3 w_a (1-a)}ρ_de,0 in which w₀ = - 0.752 ± 0.057 and w_a = - 0.86^+0.23_-0.20 . Such a DESI universe is 119 Myr younger than the LambdaCDM universe.

Related

• The Universe according to DESI results
• Is Dark Energy Dynamical in the DESI Era? A Critical Review
• DESI dark secrets
• Breaking Free from the Swampland of Impossible Universes Through the DESI Portal
• The DESI Experiment, a whitepaper for Snowmass 2013