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.
Categories: hep-ph gr-qc physics.ins-det