Structure Formation with Two Periods of Inflation: Beyond PLaIn $\Lambda$CDM

Understand

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 $\Lambda$CDM 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.