Rotating Odd-Parity Lorentz Invariance Test in Electrodynamics

TL;DR

This paper presents a novel rotating Lorentz invariance test in electrodynamics using a microwave interferometer, setting new bounds on Lorentz violation parameters and demonstrating potential for future high-precision measurements.

Contribution

It introduces a rotating odd-parity Lorentz invariance test with a microwave Mach-Zehnder interferometer and achieves the tightest bound on the Lorentz violation parameter $\kappa_{tr}$.

Findings

Set a bound on $\kappa_{tr}$ of $-0.3\pm 3\times10^{-7}$.

Achieved the highest spectral resolution of $2\times10^{-11} rad/\sqrt{Hz}$.

Demonstrated potential for several orders of magnitude improvement in future experiments.

Abstract

We report the first operation of a rotating odd-parity Lorentz Invariance test in electrodynamics using a microwave Mach-Zehnder interferometer with permeable material in one arm. The experiment sets a direct bound to $ \kappa_{tr}$ of $-0.3\pm 3\times10^{-7}$. Using new power recycled waveguide interferometer techniques (with the highest spectral resolution ever achieved of $2\times10^{-11} rad/\sqrt{Hz}$) we show an improvement of several orders of magnitude is attainable in the future.