Volume 87, Number 3, August 2009
Article Number 31001
Number of page(s) 5
Section The Physics of Elementary Particles and Fields
Published online 25 August 2009
EPL, 87 (2009) 31001
DOI: 10.1209/0295-5075/87/31001

An effective action approach to photon propagation on a magnetized background

J. Lundin

Department of Physics, Umeå University - SE-901 87 Umeå, Sweden, EU

received 17 June 2009; accepted in final form 22 July 2009; published August 2009
published online 25 August 2009

A new explicit analytical form of the dispersion relation for photon propagation in the presence of a strong background magnetic field is derived within the effective action framework. The dispersion relation is expressed in terms of well-known special functions, and the treatment is exact within the linearization procedure, the one-loop approximation, and the soft photon approximation. The results are incorporated in a kinetic spin plasma description for the purpose of studying quantum electrodynamical effects of strongly magnetized plasmas. The results are applied to astrophysical examples.

12.20.-m - Quantum electrodynamics.
11.10.Ef - Lagrangian and Hamiltonian approach.
52.40.Db - Electromagnetic (nonlaser) radiation interactions with plasma.

© EPLA 2009