Phys. Rev. Lett. 95, 040404 (2005) [4 pages]Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave OscillatorsReceived 2 May 2005; published 21 July 2005 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 framework 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, PMM=δ-β+1/2 is set, which is more than a factor of 7 improvement. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.040404
DOI:
10.1103/PhysRevLett.95.040404
PACS:
03.30.+p, 06.30.Ft, 11.30.Cp, 84.40.−x
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.