Electromagnetic plasma waves in Big Bounce and Big Crunch cosmologies
Plasma Physics
2025-05-12 v1 General Relativity and Quantum Cosmology
Abstract
We study the exact dynamics of electromagnetic waves in cold electron-positron plasma in the simplest background of Big Bounce and Big Crunch cosmologies. We show that these waves are described by a Mathieu equation in a Big Bounce cosmology, which opens the possibility of electromagnetic wave amplification due to the cosmological constant in this Universe. On the contrary, in a Big Crunch cosmology, electromagnetic plasma waves are described by a modified Mathieu equation. In both cases, the features (grow/collapse) of the Universes imprint similar characteristics in the temporal evolution of these waves.
Keywords
Cite
@article{arxiv.2505.05718,
title = {Electromagnetic plasma waves in Big Bounce and Big Crunch cosmologies},
author = {Felipe A. Asenjo},
journal= {arXiv preprint arXiv:2505.05718},
year = {2025}
}