Tachyonic Quintessential Inflation

TL;DR

This paper explores a unified model of early universe inflation and late-time acceleration using a tachyonic scalar field, emphasizing the importance of reheating for cosmological consistency and a second acceleration phase.

Contribution

It proposes a novel single-field tachyonic model that accounts for both inflation and current acceleration, highlighting the role of reheating and exponential potential dynamics.

Findings

A viable cosmological scenario with a tachyonic field is constructed.

Reheating is shown to be crucial for the model's consistency.

The model can produce a second accelerated expansion period.

Abstract

We study the possibility to construct an observationally viable scenario where both early Inflation and the recently detected accelerated expansion of the universe can be explained by using a single scalar field associated with the Tachyon. The Reheating phase becomes crucial to enable us to have a consistent cosmology and also to get a second accelerated expansion period. A discussion using an exponential potential is presented.