Abstract
This paper proposes two phenomenological quintessence potentials with parameters fitted to the presently observed ratio R 0 of smooth energy to clustered mass and limits on the equation of state parameter w Q ( a) = P/ϱ Q , for which the quintessence potential is now slow- or fast-rolling. These two potentials are intended to illustrate rather different quintessence phenomenology after reaching the attractor and into the near future. Neither can be a fundamental potential derivable from present-day string theory.
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