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

## TL;DR

This paper explores models with two inflationary periods involving a spectator field, showing how small-scale fluctuations can be suppressed while large-scale structures remain consistent with observations, potentially revealing observable features in the local universe.

## Contribution

It introduces a model with a secondary inflationary epoch that suppresses small-scale fluctuations, extending beyond the standard $ ext{Λ}$CDM framework.

## Key findings

- Small-scale primordial fluctuations can be significantly suppressed.
- Large-scale fluctuations remain consistent with current observations.
- Secondary inflationary epoch can produce observable features in the local universe.

## Abstract

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.