Magnetars as Laboratories for Strong Field QED
Abstract
A strong electromagnetic field polarizes the vacuum and in the presence of an electric field creates pairs of a charged particle and its anti-particle. Magnetars, highly magnetized neutron stars with magnetic field comparable to or greater than the Schwinger field, give a significant amount of the vacuum polarization and vacuum birefringence and the induced electric field can create the electron-positron pairs, which are strong field quantum electrodynamics (QED) processes. In this paper, we use a closed formula for the one-loop effective action in the presence of a supercritical magnetic field and a subcritical electric field, find the vacuum birefringence analytically and numerically, and then discuss possible measurements in magnetars.
Cite
@article{arxiv.2112.02460,
title = {Magnetars as Laboratories for Strong Field QED},
author = {Chul Min Kim and Sang Pyo Kim},
journal= {arXiv preprint arXiv:2112.02460},
year = {2021}
}
Comments
Proceedings for the 17th Italian-Korean Symposium on Relativistic Astrophysics, Korea, August 2-6, 2021; 8 pages, three figures