328 citations · 1.4k across the 14 of their papers we have counts for
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Direct Terrestrial Test of Lorentz Symmetry in Electrodynamics to 10
M. Nagel, S. R. Parker, E. V. Kovalchuk +5
Lorentz symmetry is a foundational property of modern physics, underlying the standard model of particles and general relativity. It is anticipated that these two theories are low…
Cavity Bounds on Higher-Order Lorentz-Violating Coefficients
Stephen R. Parker, Matthew Mewes, Michael E. Tobar +1
We determine the sensitivity of a modern Michelson-Morley resonant-cavity experiment to the higher-order nonbirefringent and nondispersive coefficients of the Lorentz-violating Sta…
Improved Constraints on Isotropic Shift and Anisotropies of the Speed of Light using Rotating Cryogenic Sapphire Oscillators
Michael A. Hohensee, Paul. L. Stanwix, Michael Edmund Tobar +3
We demonstrate that Michelson-Morley tests, which detect direction-dependent anisotropies in the speed of light, can also be used to place limits upon isotropic deviations of the v…
Rotating Odd-Parity Lorentz Invariance Test in Electrodynamics
Michael E. Tobar, Eugene N. Ivanov, Paul L. Stanwix +2
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.…
Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators
Paul L. Stanwix, Michael E. Tobar, Peter Wolf +5
We present the first results from a rotating Michelson-Morley experiment that uses two orthogonally orientated cryogenic sapphire resonator-oscillators operating in whispering gall…
Rotating Resonator-Oscillator Experiments to Test Lorentz Invariance in Electrodynamics
Michael E. Tobar, Paul L. Stanwix, Mohamad Susli +3
In this work we outline the two most commonly used test theories (RMS and SME) for testing Local Lorentz Invariance (LLI) of the photon. Then we develop the general framework of ap…