Testing vacuum electrodynamics using `slow light' experiments
S. P. Flood, D. A. Burton
TL;DR
This paper analyzes a proposal to test vacuum electrodynamics with slow light experiments, emphasizing the importance of non-coplanar configurations and exploring invariance under electric-magnetic duality.
Contribution
It refines the experimental setup for testing vacuum electrodynamics and examines the role of duality invariance in such experiments.
Findings
The proposal should include non-coplanar magnetic and electric fields.
Invariance under Gibbons' duality rotations affects experimental design.
Modifications improve the feasibility of vacuum electrodynamics tests.
Abstract
A recent proposal to explore vacuum electrodynamics using the speed of propagation of an electromagnetic pulse through an ambient constant magnetic field is examined. It is argued that the proposal should be modified so that the background magnetic field, the direction of propagation and the transverse projection of the electric field (with respect to the direction of propagation) are not coplanar. The implications of invariance under Gibbons' electric-magnetic duality rotations are determined in this context.
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