Observable Small-scale Effects of Thermal Inflation
  Thermal inflation, a brief low energy inflation after the primordial
inflation, resolves the moduli problem in the context of supersymmetric
cosmology. In the thermal inflation scenario, the primordial power spectrum is
modestly redshifted on large scales, but suppressed by a factor of 1/50 on
scales smaller than the horizon size at the beginning of thermal inflation. We
compare the thermal inflation model with the warm dark matter and $\Lambda$CDM
scenarios by studying CMB spectral distortions, halo abundances, and 21cm
hydrogen lines.
