Light Propagation Effects In QED: Effective Action Approach
Y.M. Cho, D.G. Pak, M.L. Walker
TL;DR
This paper investigates how light propagates in constant electromagnetic backgrounds within QED, deriving analytical formulas for light velocity modes in various field regimes, including ultra-strong magnetic fields relevant to neutron stars.
Contribution
It provides the first analytical series representation for the one-loop effective action of QED applied to light birefringence in strong fields.
Findings
Analytical light velocity modes for weak and strong fields.
Asymptotic formulas for ultra-strong magnetic fields.
Application to neutron star magnetic environments.
Abstract
The effects of light propagation in constant magnetic and electric backgrounds are considered in the framework of the effective action approach. We use the exact analytic series representation for the one-loop effective action of QED and apply it to the birefringence effect. Analytical results for the light velocity modes are obtained for weak and strong field regime. We present asymptotic formulae for the light velocity modes for the ultra strong magnetic field which can be realized in some neutron stars.
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