A Model of Universe Anisotropization

TL;DR

This paper proposes a mechanism where Lorentz-violating effects during inflation amplify magnetic fields with planar symmetry, potentially explaining galactic magnetic fields and large-scale universe anisotropies.

Contribution

It introduces a model linking Lorentz violation in photon sectors to universe anisotropization and magnetic field generation during inflation.

Findings

Generated magnetic fields can reach nanogauss levels.

The model predicts a planar symmetry in large-scale magnetic fields.

It offers an explanation for CMB quadrupole anomalies.

Abstract

The presence of a nonconformally invariant term in the photon sector of the Lorentz-violating extension of Standard Model of particle physics, the "Kosteleck\'{y} term" $\mathcal{L}_K \propto (k_F)_{\alpha \beta \mu \nu} F^{\alpha \beta} F^{\m \nu}$, enables a superadiabatic amplification of magnetic vacuum fluctuations during de Sitter inflation. For a particular form of the external tensor $k_F$ that parameterizing Lorentz violation, the generated field possesses a planar symmetry at large cosmological scales and can have today an intensity of order of nanogauss for a wide range of values of parameters defining inflation. This peculiar magnetic field could account for the presently-observed galactic magnetic fields and induces a small anisotropization of the universe at cosmological scales. The resulting Bianchi I model could explain the presumedly low-quadrupole power in the Cosmic Microwave Background radiation.