Inflation in anisotropic brane universe using tachyon field

TL;DR

This paper explores inflationary solutions in an anisotropic brane universe with a tachyonic matter source, showing how anisotropy diminishes over time and presenting scenarios with and without initial singularities.

Contribution

It introduces new cosmological solutions in the Randall-Sundrum model incorporating a tachyon field in anisotropic settings, highlighting inflation and anisotropy decay.

Findings

Universe undergoes inflation and anisotropy diminishes over time.

Two cosmological scenarios: one from a singularity, one without.

Tachyon field drives inflation in anisotropic brane models.

Abstract

Cosmological solution to the gravitational field equations in the generalized Randall-Sundrum model for an anisotropic brane with Bianchi I geometry and perfect fluid as matter sources has been considered. The matter on the brane is described by a tachyonic field. The solution admits inflationary era and at a later epoch the anisotropy of the universe washes out. We obtain two classes of cosmological scenario, in the first case universe evolves from singularity and in the second case universe expands without singularity.