# Behavior of varying-alpha cosmologies

@article{Barrow2002BehaviorOV,
title={Behavior of varying-alpha cosmologies},
author={John D. Barrow and H{\aa}vard Bunes Sandvik and Jo{\~a}o Magueijo},
journal={Physical Review D},
year={2002},
volume={65},
pages={063504}
}
• Published 2002
• Physics
• Physical Review D
We determine the behaviour of a time-varying fine structure 'constant' $\alpha (t)$ during the early and late phases of universes dominated by the kinetic energy of changing $\alpha (t)$, radiation, dust, curvature, and lambda, respectively. We show that after leaving an initial vacuum-dominated phase during which $\alpha$ increases, $\alpha$ remains constant in universes like our own during the radiation era, and then increases slowly, proportional to a logarithm of cosmic time, during the… Expand
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