# Tests of Lorentz invariance using a microwave resonator.

@article{Wolf2003TestsOL, title={Tests of Lorentz invariance using a microwave resonator.}, author={Peter Wolf and Sebastien Bize and Andr{\'e} Clairon and Andre Nicholas Luiten and Giorgio Santarelli and Michael E. Tobar}, journal={Physical review letters}, year={2003}, volume={90 6}, pages={ 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+/-4.2) x 10(-9) and beta-alpha - 1…

## 131 Citations

Tests of Lorentz invariance using a microwave resonator: an update

- PhysicsIEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003
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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…

Test of Lorentz invariance in electrodynamics using rotating cryogenic sapphire microwave oscillators.

- PhysicsPhysical review letters
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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.

Whispering Gallery Resonators and Tests of Lorentz Invariance

- Physics
- 2004

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 give a detailed description of microwave…

Rotating Michelson-Morley experiment based on a dual cavity cryogenic sapphire oscillator

- PhysicsProceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.
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Recent experiments based on cryogenic microwave oscillators have tested the isotropy of the speed of light (Michelson-Morley experiment) at sensitivities of the order of a part in 10/sup 15/, which…

Testing local Lorentz invariance in electrodynamics

- Physics
- 2007

This thesis presents the design, construction and operation of a new rotating modern Michelson-Morley test of Lorentz invariance. The experiment measures the isotropy of the speed of light by…

A Michelson-Morley test of Lorentz invariance using a rotating optical cavity

- Physics
- 2008

This thesis presents a modern Michelson-Morley experiment, which provides improved limits on test parameters that model a violation of Lorentz invariance in electrodynamics. The measurement thereby…

Precision test of the isotropy of light propagation

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- 2003

We report on a test of the isotropy of light propagation performed by comparing the resonance frequencies of two orthogonal cryogenic optical resonators subject to Earth’s rotation over ∼1 yr. The…

Test of constancy of speed of light with rotating cryogenic optical resonators

- Physics
- 2005

est order in uv Wu / c0 as csf , vd / c0 =1+ sv 2 / c0 dfb ˛ a ˛1+ s 1 ˛ b + ddsin 2 fg, where f is the angle of the direction of light propagation relative to the velocity v W of the laboratory.…

Next Generation of Phonon Tests of Lorentz Invariance Using Quartz BAW Resonators

- PhysicsIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- 2018

Preliminary results of the second generation of phonon sector tests of the Lorentz invariance that implement quartz bulk acoustic wave oscillators indicate that standard model extension coefficients in the matter sector can be measured at a precision of order 10−16 GeV after taking a year’s worth of data.

Testing local Lorentz and position invariance and variation of fundamental constants by searching the derivative of the comparison frequency between a cryogenic sapphire oscillator and hydrogen maser

- Materials Science
- 2010

The cryogenic sapphire oscillator at the Paris Observatory has been continuously compared to various hydrogen masers since 2001. The early data sets were used to test local Lorentz invariance in the…

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