Tests of relativity using a microwave resonator

Details Tests of relativity using a microwave resonator Tests of relativity using a microwave resonator

2002-10-15

arxiv.org/abs/gr-qc/0210049v2

Phys.Rev.Lett. 90 (2003) 060402

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

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

Scientific paper

10.1103/PhysRevLett.90.060402

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.

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