# Early inflation based on an aboriginal black hole

## TL;DR

This paper proposes that a primordial black hole could have driven early universe inflation by providing vacuum energy, estimating the inflation period to be extremely brief with about 70 e-foldings.

## Contribution

It introduces a model where a single primordial black hole causes early inflation through vacuum energy, linking black hole physics with cosmological inflation.

## Key findings

- Inflation began at approximately 10^{-45} seconds.
- Inflation ended around 10^{-43} seconds.
- The model predicts about 70 e-foldings during inflation.

## Abstract

It has been recently proposed that the interior of a black hole is vacuum energy, and this offers a possible explanation for the dark energy of the current observable universe. In this article we explore the idea that black holes are a source of vacuum energy in the early universe as well, and could possibly explain early inflation. Our scenario pre-supposes a single aboriginal black hole as the source of vacuum energy that drives inflation and eventually evaporates due to Hawking radiation. In such a model we can estimate $t_i $ and $t_f $ which are the times when inflation began and ended respectively. Our simplified model leads to $t_i \approx 10^{-45}$ sec, $t_f \approx 10^{-43} $ sec and the number of e-foldings during inflation to be about $70$.