Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 16, Pages 3339-3342Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.3339
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We construct a time dependent adjustment, mechanism for the cosmological 'constant which could be at work in a late Friedmann-Robertson-Walker universe dominated by quintessence and matter. It makes use of a Brans-Dicke field that couples to the evolving standard-model vacuum energy density. Our explicit model possesses a stable late-time solution with a fixed ratio of matter and field energy densities. No fine-tuning of model parameters or initial conditions is required.
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