Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 10, Pages 2076-2079Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.2076
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Modern data are showing increasing evidence that the Universe is accelerating. So far, all attempts to account for the acceleration have required some fundamental dimensionless quantities to be extremely small. We show how a class of scalar field models (which may emerge naturally from superstring theory) can account for acceleration which starts in the present epoch with all the potential parameters O(1) in Planck units.
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