Test of the Isotropy of the Speed of Light Using Fast-Beam Laser Spectroscopy

Riis, Erling; Andersen, Lillie; Bjerre, N.; Poulsen, O.; Lee, Siu Au; Hall, John L.

doi:10.1103/physrevlett.60.81

Cited by 128 publications

(63 citation statements)

References 8 publications

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“…We note that our value on δ MS − β MS + 1/2 is compatible with the slightly significant recent result of [15] who obtained δ MS − β MS + 1/2 = (2.2 ± 1.5) × 10 −9 . As a result of our experiment the Lorentz transformations are confirmed in the RMS framework with an overall uncertainty of ≤ 8 × 10 −7 limited now by the determination of α MS from Doppler and clock comparison experiments [26,27]. This is likely to be improved in the coming years by experiments such as ACES (Atomic Clock Ensemble in Space [41]) that will compare ground clocks to clocks on the international space station aiming at a 10 fold improvement on the determination of α MS .…”

Section: Resultssupporting

confidence: 62%

Whispering Gallery Resonators and Tests of Lorentz Invariance

Wolf

Tobar

Bize

et al. 2004

General Relativity and Gravitation

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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 give a detailed description of microwave resonators operating in Whispering Gallery modes and then apply it to derive explicit models for Lorentz violating effects in our experiment. Models are calculated in the theoretical framework of Robertson, Mansouri and Sexl and in the standard model extension (SME) of Kostelecky and co-workers. We constrain the parameters of the Mansouri and Sexl test theory to 1/2−βMS +δMS = (1.2±2.2)×10 −9 and βMS −αMS −1 = (1.6±3.0)×10which is of the same order as the best results from other experiments for the former and represents a 70 fold improvement for the latter. These results correspond to an improvement of our previously published limits [Wolf P. et al., Phys. Rev. Lett. 90, 6, 060402, (2003)] by about a factor 2.

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Section: Resultssupporting

confidence: 62%

Whispering Gallery Resonators and Tests of Lorentz Invariance

Wolf

Tobar

Bize

et al. 2004

General Relativity and Gravitation

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“…Our experiment limits j ÿ 1=2j 4:2 10 ÿ9 , which is of the same order as the best previous results [6,20], and j ÿ ÿ 1j 6:9 10 ÿ7 , which improves the best present limit [9] by a factor of 30. As a result, the Lorentz transformations are confirmed in this particular test theory with an overall uncertainty of 8 10 ÿ7 limited now by the determination of from Doppler and clock comparison experiments [15,16]. This is likely to be improved in the coming years by experiments such as ACES (atomic clock ensemble in space [30]) that will compare ground clocks to clocks on the international space station aiming at a 10-fold improvement on the determination of .…”

mentioning

confidence: 77%

“…Owing to their simplicity, the kinematical frameworks of [10,11] have been widely used to model and interpret many previous experiments testing LLI [6,8,9,15,16]. In order to compare our results to those experiments, we will follow this route in the present work (an analysis of our experiment in the light of other test theories being relegated to a future publication).…”

mentioning

confidence: 99%

Tests of Lorentz Invariance using a Microwave Resonator

et al. 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 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 δ − β + 1/2 ≤ 3.4 × 10 −9 and β − α − 1 ≤ 4.1 × 10 −7 which is of the same order as the best previous result for the former and represents a 50 fold improvement for the latter. These results correspond to an improvement of our previously published limits [Wolf P. et al., Phys. Rev. Lett. 90, 6, 060402, (2003)] by about a factor 2. We describe the changes of the experiment, and show the new data that lead to that improvement.

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“…This problem becomes negligible when using laser-cooled atoms with low velocities (∼10 cm s −1 ). Conversely, the time-dilation effect can be enhanced and measured by using precision laser spectroscopy of fast moving atomic beams as done by Snyder, Riis, McGowan and Saathoff and their respective colleagues [96][97][98][99]. Measuring the optical frequency difference between fast and slow atoms determines the relativistic time dilation.…”

Section: Optical Frequency References and Einstein's Relativitymentioning

confidence: 99%

Optical frequency/wavelength references

Hollberg¹,

Oates²,

Wilpers³

et al. 2005

J. Phys. B: At. Mol. Opt. Phys.

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For more than 100 years, optical atomic/molecular frequency references have played important roles in science and technology, and provide standards enabling precision measurements. Frequency-stable optical sources have been central to experimental tests of Einstein's relativity, and also serve to realize our base unit of length. The technology has evolved from atomic discharge lamps and interferometry, to narrow atomic resonances in laser-cooled atoms that are probed by frequency-stabilized cw lasers that in turn control optical frequency synthesizers (combs) based on ultra-fast mode-locked lasers. Recent technological advances have improved the performance of optical frequency references by almost four orders of magnitude in the last eight years. This has stimulated new enthusiasm for the development of optical atomic clocks, and allows new probes into nature, such as searches for time variation of fundamental constants and precision spectroscopy.

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Test of the Isotropy of the Speed of Light Using Fast-Beam Laser Spectroscopy

Cited by 128 publications

References 8 publications

Whispering Gallery Resonators and Tests of Lorentz Invariance

Whispering Gallery Resonators and Tests of Lorentz Invariance

Tests of Lorentz Invariance using a Microwave Resonator

Optical frequency/wavelength references

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