Structure formation with two periods of inflation: beyond PLaIn ΛCDM

Kari Enqvist, Till Sawala, Tomo Takahashi
2020 Journal of Cosmology and Astroparticle Physics  
We discuss structure formation in models with a spectator field in small-field inflation which accommodate a secondary period of inflation. In such models, subgalactic scale primordial fluctuations can be much suppressed in comparison to the usual power-law ΛCDM model while the large scale fluctuations remain consistent with current observations. We discuss how a secondary inflationary epoch may give rise to observable features in the small scale power spectrum and hence be tested by the structures in the Local Universe.
doi:10.1088/1475-7516/2020/10/053 fatcat:t7cngutgtrao7fka4k43fonrvq