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Status: Unchecked ×Keyword: dark energy potential ×Clear all

1 claim from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   DESI Constraints on Exponential Quintessence

   Ramadan, Sakstein and David · arXiv (Cornell University) · 2024

   The authors test a field-theory model of thawing dark energy, exponential quintessence, against DESI first-year data and find no preference over ΛCDM and a poorer fit than the w0–wa parameterisation.

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   1. UncheckedThe paper says exponential quintessence fits worse than a flexible parameterisation because its smooth potential gives a slowly changing dark energy equation of state.“We demonstrate that the worse fit is due to a lack of sharp features in the potential that results in a slowly-evolving dark energy equation of state that does not have enough freedom to simultaneously fit the combination of the supernovae, DESI, and cosmic microwave background data.”