Searching for a matter bounce cosmology with low redshift observations
  The matter bounce scenario allows for a sizable parameter space where
cosmological fluctuations originally exited the Hubble radius when the
background energy density was small. In this scenario and its extended
versions, the low energy degrees of freedom are likely responsible for the
statistical properties of the cosmic microwave background power spectrum at
large length scales. An interesting consequence is that these modes might be
observable only at relatively late times. Therefore low redshift observations
could provide evidence for, or even falsify, various bouncing models. We
provide an example where a recently hinted potential deviation from
$\Lambda$-cold-dark-matter cosmology results from a dark matter and dark energy
interaction. The same interaction allows matter bounce models to generate a red
tilt for the primordial curvature perturbations in corroboration with cosmic
microwave background experiments.
