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A New Limit on Signals of Lorentz Violation in Electrodynamics

J. A. Lipa·J. A. Nissen·S. Wang·D. A. Stricker·D. Avaloff
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Abstract

We describe the results of an experiment to test for spacetime anisotropy terms that might exist from Lorentz violations. The apparatus consists of a pair of cylindrical superconducting cavity-stabilized oscillators operating in the TM_{010} mode with one axis east-west and the other vertical. Spatial anisotropy is detected by monitoring the beat frequency at the sidereal rate and its first harmonic. We see no anisotropy to a part in 10^{13}. This puts a comparable bound on four linear combinations of parameters in the general Standard Model extension, and a weaker bound of <4 x 10^{-9} on three others.

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J. A. Lipa, J. A. Nissen, S. Wang, D. A. Stricker, D. Avaloff. 2003-02-26. A New Limit on Signals of Lorentz Violation in Electrodynamics. https://doi.org/10.1103/physrevlett.90.060403

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