Lorentz-violating dynamics in the pre-Planckian Universe

TL;DR

This paper explores how Lorentz-violating physics with a momentum cutoff affects early Universe cosmology, proposing a novel solution to horizon and flatness problems without inflation.

Contribution

It introduces a Lorentz-violating dispersion relation with a momentum cutoff and demonstrates its implications for solving key cosmological issues.

Findings

Predicts infinite effective speed of light immediately after the Big Bang

Provides a horizon and flatness problem solution without inflation

Suggests Lorentz violation impacts pre-Planckian cosmology

Abstract

We have recently proposed a Lorentz-violating energy-momentum relation entailing an exact momentum cutoff and studied various physical applications of that dispersion law. By a simple phenomenological approach we here study Lorentz violation effects on early Universe and pre-Planckian cosmological radiation. In particular, we predict an effective infinite speed of light soon after the Big Bang instant, leading to a straightforward solution of the horizon and flatness problems without recourse to inflation, cosmological scalar fields or other ad hoc energy sources.