A false-vacuum quintessence model is claimed to produce late-time acceleration with -0.04<lambda<0.1 and -0.8<weff<-0.4, but the central expression for weff is fitted to data, not derived.
Cosmological implications of quantum mechanics parametrization of dark energy
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Quintessence and false vacuum: Two sides of the same coin?
A false-vacuum quintessence model is claimed to produce late-time acceleration with -0.04<lambda<0.1 and -0.8<weff<-0.4, but the central expression for weff is fitted to data, not derived.