Tests of relativity using a microwave resonator

Abstract

The frequencies of a cryogenic sapphire oscillator and a hydrogen maser are compared to set new constraints on a possible violation of Lorentz invariance. We determine the variation of the oscillator frequency as a function of its orientation (Michelson-Morley test) and of its velocity (Kennedy-Thorndike test) with respect to a preferred frame candidate. We constrain the corresponding parameters of the Mansouri and Sexl test theory to $\delta -\beta +1/2=(1.5\pm 4.2)\times 10^{-9}$ and $\beta -\alpha -1=(-3.1\pm 6.9)\times 10^{-7}$ which is equivalent to the best previous result for the former and represents a 30 fold improvement for the latter.

8 pages, 2 figures, submitted to Physical Review Letters (October 3, 2002)

References in corpus (4)

• CPT Violation and the Standard Model
• The String Dilaton and a Least Coupling Principle
• Clock-Comparison Tests of Lorentz and CPT Symmetry in Space
• Proposal for a New Michelson-Morley Experiment Using a Single Whispering Spherical Mode Resonator

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