Impact of Lorentz Violation on Cosmology

TL;DR

This paper explores how Lorentz violation influences cosmological models, affecting inflation dynamics and potentially explaining the universe's acceleration through novel brane models with Lorentz-violating terms.

Contribution

It introduces Lorentz violating DGP brane models that can accelerate the universe and discusses their implications for cosmology.

Findings

Lorentz violation alters chaotic inflation dynamics

Lorentz violating DGP models can drive cosmic acceleration

Ghost disappearance conjecture in Lorentz violating models

Abstract

We discuss the impact of Lorentz violation on the cosmology. Firstly, we show that the Lorentz violation affects the dynamics of the chaotic inflationary model and gives rise to an interesting feature. Secondly, we propose the Lorentz violating DGP brane models where the Lorentz violating terms on the brane accelerate the current universe. We conjecture that the ghost disappears in the Lorentz violating DGP models.