CP-violating non-linear electrodynamics and corrections to blackbody radiation thermal laws

TL;DR

This paper explores how CP-violating non-linear electrodynamics affects vacuum properties and blackbody radiation laws, revealing bi-anisotropic behavior and deviations from classical thermodynamic quantities.

Contribution

It introduces a formalism for photon behavior at low temperatures in CP-violating models and analyzes their impact on blackbody radiation laws and thermodynamic deviations.

Findings

Vacuum exhibits bi-anisotropic behavior due to CP violation.

Deviations in energy, pressure, entropy, and specific heat from standard thermodynamics.

Modifications to Planck distribution and Stefan-Boltzmann law caused by CP-violating parameters.

Abstract

Motivated by ideas from effective field theories, we conduct a twofold investigation in CP-violating non-linear electrodynamics models. On the one hand, features related to field equations and wave propagation in the presence of a magnetic background field are evaluated. Interestingly, we show that the CP-violating term in our framework induces a bi-anisotropic behavior of the vacuum. On the other hand, blackbody radiation thermal laws in this situation are studied. Here, we provide a general formalism for photons at low temperature, namely, with $k_{B}T\ll{m_{e}c^{2}}$. The deviations from standard values of the thermodynamic quantities, such as energy, pressure, entropy, and specific heat, are discussed. In addition, we investigate the modifications in the Planck distribution and the Stefan-Boltzmann law induced by a non-trivial CP-violating parameter.