NDLI: Tests of Lorentz invariance using a microwave resonator: an update

Content Provider	IEEE Xplore Digital Library
Author	Wolf, P. Bize, S. Clairon, A. Santarelli, G. Luiten, A.N. Tobar, M.E.
Copyright Year	2003
Description	Author affiliation: Obs. de Paris, France (Wolf, P.; Bize, S.; Clairon, A.; Santarelli, G.)
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 /spl delta/-/spl beta/+ 1/2 /spl les/3.4/spl times/10/sup -9/ and /spl beta/-/spl alpha/-1/spl les/4.1/spl times/10/sup -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 by about a factor 2. We describe the changes of the experiment, and show the new data that lead to that improvement.
Sponsorship	IEEE Ultrasonics, Ferroelectrics, and Frequency Control Soc. Piezoelectric Devises Association
Starting Page	205
Ending Page	210
File Size	356281
Page Count	6
File Format	PDF
ISBN	0780376889
ISSN	10756787
DOI	10.1109/FREQ.2003.1275088
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Lorentz covariance Physics Frequency Hydrogen Masers Cryogenics Stability Microwave oscillators Australia
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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