Varying Alpha

Abstract

We review properties of cosmological theories for the variation of the fine structure 'constant'. We highlight some general features of the cosmological models that exist in these theories with reference to recent quasar data that are consistent with time-variation in the fine structure 'constant' since a redshift of 3.5.

9 pages, Paper for the Proceedings of the Grassmann Bicentennial Conference, 'Grasscosmofun'09', Univ. Szczecin Sept. 14-19, 2009

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• Cosmological Constant, Fine Structure Constant and Beyond
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• Statistical hierarchy of varying speed of light cosmologies
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• Dimensionless cosmology
• Cyclic multiverses
• Observational Constraints on Varying Alpha in $\Lambda (\alpha )$CDM Cosmology
• Entropic force, running gravitational coupling and future singularities
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• From the Cosmological Constant: Higgs Boson, Dark Matter, and Quantum Gravity Scales
• Accelerated expansion as manifestation of gravity: when Dark Energy belongs to the left