Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators

2005/06/30 by Paul L. Stanwix, Michael E. Tobar, Peter Wolf +5 · 1 citation
Physics and Astronomy · #hep-ph #astro-ph #gr-qc

paper · pdf · doi:10.1103/physrevlett.95.040404

published as Phys.Rev.Lett. 95 (2005) 040404 · Final published version, 4 pages, references added

arxiv created 2005/07/21 · arxiv updated 2009/12/01

Abstract

We present the first results from a rotating Michelson-Morley experiment that uses two orthogonally orientated cryogenic sapphire resonator-oscillators operating in whispering gallery modes near 10 GHz. The experiment is used to test for violations of Lorentz Invariance in the frame-work of the photon sector of the Standard Model Extension (SME), as well as the isotropy term of the Robertson-Mansouri-Sexl (RMS) framework. In the SME we set a new bound on the previously unmeasured κ_e-^ZZ component of 2.1(5.7)×10^-14, and set more stringent bounds by up to a factor of 7 on seven other components. In the RMS a more stringent bound of -0.9(2.0)× 10^-10 on the isotropy parameter, P_MM=δ- β+ 1/2 is set, which is more than a factor of 7 improvement. More detailed description of the experiment and calculations can be found in: hep-ph/0506200

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