Semiclassical Gravitoelectromagnetic inflation in a Lorentz gauge: seminal inflaton fluctuations and electromagnetic fields from a 5D vacuum state

TL;DR

This paper investigates the generation and evolution of inflaton and electromagnetic fields during early universe inflation using a 5D vacuum state and a Lorentz gauge, highlighting super adiabatic magnetic field amplification.

Contribution

It introduces a Lorentz gauge in semiclassical Gravitoelectromagnetic Inflation, enabling super adiabatic amplification of magnetic fields on cosmological scales.

Findings

Super adiabatic amplification of magnetic fields during inflation

Use of Lorentz gauge distinguishes this work from previous models

Non-conformal invariance allows magnetic field growth on large scales

Abstract

Using a semiclassical approach to Gravitoelectromagnetic Inflation (GEMI), we study the origin and evolution of seminal inflaton and electromagnetic fields in the early inflationary universe from a 5D vacuum state. The difference with other previous works is that in this one we use a Lorentz gauge. Our formalism is naturally not conformal invariant on the effective 4D de Sitter metric, which make possible the super adiabatic amplification of magnetic field modes during the early inflationary epoch of the universe on cosmological scales.