Time evolution of the fine structure constant in a two-field quintessence model

2004/02/29 by M. C. Bento, Orfeu Bertolami, O. Bertolami +1 · 1 citation
Physics and Astronomy · #Age of the universe #Astronomy #Astrophysics #Constant (computer programming) #Context (archaeology) #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Electron #Field (mathematics) #Fine-structure constant #Geology #Meteorite #Nuclear physics #Nucleosynthesis #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Quasar #Quintessence #Radio Astronomy Observations and Technology #Supernova #astro-ph

paper · pdf · doi:10.1103/physrevd.70.107304

published as Phys.Rev. D70 (2004) 107304 · 6 pages, 5 figures, RevTex4

arxiv created 2004/05/28 · openalex publication_date 2004/11/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We examine the variation of the fine structure constant in the context of a two-field quintessence model. We find that, for solutions that lead to a transient late period of accelerated expansion, it is possible to fit the data arising from quasar spectra and comply with the bounds on the variation of \ensuremathα from the Oklo reactor, meteorite analysis, atomic clock measurements, cosmic microwave background radiation, and big bang nucleosynthesis. That is more difficult if we consider solutions corresponding to a late period of permanent accelerated expansion.

Citations

• Models of quintessence coupled to the electromagnetic field and the cosmological evolution of alpha
• Phenomenology of a Realistic Accelerating Universe Using Only Planck-Scale Physics
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• Constraints on the variations of the fundamental couplings
• Evolution of the fine structure constant driven by dark matter and the cosmological constant
• Time variation of the fine structure constant driven by quintessence

Cited by

• The variation of the electromagnetic coupling and quintessence
• Observational constraints on f(T) gravity from varying fundamental constants