Figure 14: Expected constraints on the growth rates in each redshift bin. For each the central
error bars refer to the Reference case while those referring to the Optimistic and Pessimistic case
have been shifted by and respectively. The growth rates for different models are
also plotted: CDM (green tight shortdashed curve), flat DGP (red longdashed curve) and a model
with coupling between dark energy and dark matter (purple, dot-dashed curve). The blue curves
(shortdashed, dotted and solid) represent the model by [456] with respectively.
The plot shows that it will be possible to distinguish these models with next generation data.
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