Phys. Rev. D 70, 107304 (2004) [4 pages]Time evolution of the fine structure constant in a two-field quintessence modelReceived 9 February 2004; published 16 November 2004 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 α 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.70.107304
DOI:
10.1103/PhysRevD.70.107304
PACS:
98.80.Cq, 12.60.–i
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