Figure 11: The simulated behaviour of a mode on superhorizon scales. On the left we show how the
gauge invariant switches from the high-energy behaviour predicted to the familiar GR result as
the universe expands through the critical epoch. We also show how the KK anisotropic stress
steadily decays throughout the simulation, which is typical of all the cases we have investigated.
On the right, we show the metric perturbations and as well as the curvature
perturbation . Again, note how the GR result is recovered at low energy.
Figure taken from [69].
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