N-body simulations of structure formation in thermal inflation cosmologies

Understand

Thermal inflation models (which feature two inflationary stages) can display damped primordial curvature power spectra on small scales which generate damped matter fluctuations.

• For a reasonable choice of parameters, thermal inflation models naturally predict a suppression of the matter power spectrum on galactic and sub-galactic scales, mimicking the effect of warm or interacting dark matter.
• Matter power spectra in these models are also characterised by an excess of power (w.r.t.
• the standard $\Lambda$CDM power spectrum) just below the suppression scale.