Kasner cosmology in bumblebee gravity

TL;DR

This paper explores Kasner cosmology within the bumblebee gravity model, linking anisotropic expansion to spontaneous Lorentz symmetry breaking and suggesting implications for pre-inflationary cosmology.

Contribution

It introduces a novel interpretation of Kasner cosmology in the bumblebee model, connecting anisotropy to Lorentz symmetry breaking.

Findings

Anisotropic Kasner cosmology can be derived from bumblebee gravity.

Lorentz symmetry breaking explains the origin of anisotropy.

Potential implications for pre-inflationary cosmological scenarios.

Abstract

Kasner cosmology is a vacuum and anisotropically expanding spacetime in the general relativity context. In this work, such a cosmological model is studied in another context, the bumblebee model, where the Lorentz symmetry is spontaneously broken. By using the bumblebee context it is possible to justify the anisotropic feature of the Kasner cosmology. Thus, the origin of the anisotropy in this cosmological model could be in the Lorentz symmetry breaking. Lastly, an application in the pre-inflationary cosmology is suggested.