Testing nonlinear electrodynamics in waveguides: the effect of magnetostatic fields on the transmitted power

TL;DR

This paper investigates how magnetostatic fields influence wave transmission in nonlinear electrodynamics within waveguides, revealing subtle power variations that could be experimentally detected near cutoff frequencies.

Contribution

It demonstrates the impact of magnetostatic fields on wave dispersion and power transmission in nonlinear electrodynamics, providing a potential method for experimental testing.

Findings

Magnetostatic fields alter wave dispersion relations.

Transmitted power slightly changes with magnetostatic field presence.

Effects are more detectable near cutoff frequencies.

Abstract

In Born-Infeld theory and other nonlinear electrodynamics, the presence of a magnetostatic field modifies the dispersion relation and the energy velocity of waves propagating in a hollow waveguide. As a consequence, the transmitted power along a waveguide suffers slight changes when a magnetostatic field is switched on and off. This tiny effect could be better tested by operating the waveguide at a frequency close to the cutoff frequency.