2000/08/29 by A. Hebecker, Arthur Hebecker, C. Wetterich · 93 citations
Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Homogeneous #Mathematics #Metric expansion of space #Naturalness #Particle physics #Physics #Quintessence #Scalar (mathematics) #Scale factor (cosmology) #Simple (philosophy) #Statistical physics #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1016/s0370-2693(00)01339-3
published in Physics Letters B 497(3-4), 281-288 (Elsevier BV) · 11 pages LaTeX, 3 figures included, numerical correction
arxiv created 2000/08/29 · openalex publication_date 2001/01/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We formulate conditions for the naturalness of cosmological quintessence scenarios. The quintessence lagrangian is taken to be the sum of a simple exponential potential and a non-canonical kinetic term. This parameterization covers most variants of quintessence and makes the naturalness conditions particularly transparent. Several ``natural'' scalar models lead, for the present cosmological era, to a large fraction of homogeneous dark energy density and an acceleration of the scale factor as suggested by observation.