Effective Lagrangian at Cubic Order in Electromagnetic Fields and Vacuum Birefringence
High Energy Physics - Phenomenology
2008-11-26 v3 Astrophysics
High Energy Physics - Theory
Abstract
The effective Lagrangian of electromagnetic fields at the cubic order in field strength has been considered. This generalized Lagrangian is motivated by electrodynamics on non-commutative spaces. We find the canonical and symmetrical energy-momentum tensors and show that they possess non-zero traces. The propagation of a linearly polarized laser beam in the external transverse magnetic field is investigated. We evaluate the induced ellipticity which allows us to obtain a constraint on parameters introduced from the PVLAS experimental data.
Keywords
Cite
@article{arxiv.0705.0133,
title = {Effective Lagrangian at Cubic Order in Electromagnetic Fields and Vacuum Birefringence},
author = {S. I. Kruglov},
journal= {arXiv preprint arXiv:0705.0133},
year = {2008}
}
Comments
10 pages, no figures, added note, published version