Emission and absorption of photons and the black-body spectra in Lorentz-odd Electrodynamics

TL;DR

This paper investigates how Lorentz-violating terms in a modified electrodynamics framework affect photon emission, absorption, and black-body spectra, revealing specific corrections to the Planck law that could be experimentally detectable.

Contribution

It provides the first detailed analysis of how Lorentz symmetry violations modify black-body radiation spectra in a Lorentz-odd electrodynamics model.

Findings

Planck law acquires extra terms proportional to Lorentz-violating parameters.

Leading corrections depend on the orientation of the background vector relative to photon wave-vector.

Potential experimental signatures include unbalanced photon occupation numbers in thermal baths.

Abstract

We study a number of issues related to the emission and absorption radiation by non-relativistic electrons within the framework of a Lorentz-breaking electrodynamics in (3+1) dimensions. Our main results concern how Planck-like spectrum law is sensitive to terms that violate Lorentz symmetry. We have realized that Planck law acquires extra terms proportional to the violating parameters: for the CPT-odd model, the leading extra terms appear to be linear or quadratic in these violating parameters according to the background vector is parallel or perpendicular to the photon wave-vector. In the CPT-even case a linear `correction' shows up. Among other possible ways to probe for these violations, by means of the present results, we may quote the direct observation of the extra contributions or an unbalancing in the mean occupation number of photon modes in a given thermal bath.