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Title: A Michelson-Morley Test of Lorentz Symmetry for Electrons

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Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature, vol. 517, na, January 29, 2015, pp. 592-595
Country of Publication:
United States

Citation Formats

Hohensee, M A, Pruttivarasin, T, Ramm, M, Haeffner, H, Porsev, S G, Tupitsyn, I I, and Safronova, M. A Michelson-Morley Test of Lorentz Symmetry for Electrons. United States: N. p., 2014. Web.
Hohensee, M A, Pruttivarasin, T, Ramm, M, Haeffner, H, Porsev, S G, Tupitsyn, I I, & Safronova, M. A Michelson-Morley Test of Lorentz Symmetry for Electrons. United States.
Hohensee, M A, Pruttivarasin, T, Ramm, M, Haeffner, H, Porsev, S G, Tupitsyn, I I, and Safronova, M. Mon . "A Michelson-Morley Test of Lorentz Symmetry for Electrons". United States. doi:.
title = {A Michelson-Morley Test of Lorentz Symmetry for Electrons},
author = {Hohensee, M A and Pruttivarasin, T and Ramm, M and Haeffner, H and Porsev, S G and Tupitsyn, I I and Safronova, M},
abstractNote = {},
doi = {},
journal = {Nature, vol. 517, na, January 29, 2015, pp. 592-595},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 18 00:00:00 EDT 2014},
month = {Mon Aug 18 00:00:00 EDT 2014}
  • An early but potentially important remark of Einstein on the exponential nature of time-dilation is discussed. Using the same argument for the length-contraction, plus two alternative kinematical assumptions, the Schwarzschild and exponential metrics are derived. A gravitational Michelson-Morley experiment with one arm directed along the vertical is proposed to test the metrics. The experiment may be considered as a laboratory test of the Schwarzschild field and possibly a test of the black-hole interpretation of collapsed matter.
  • A theory is developed from two postulates: that the speed of light is invariant, and that any two synchronlzed clocks which are separated will again agree on reuniting. The existence of a preferred inertial frame is demonstrated and the coordinate transformations for non-uniform motion are obtained and used in an analysis of a return journey to elucidate further the clock paradox. With electrodynamics and mechanics as examples it is shown that physical laws are invariant in the special case of uniform motion and consequently that many of the arguments alleged to demonstrate special relativity do not in fact do so.more » However, in the case of non-uniform motion the theory appears to have an inherent restriction to events on the common path of observers with rectilinear motion, and until this restriction can be removed the physical validity of the theory is doubtful. (auth)« less
  • Voigt's 1887 explanation of the Michelson-Morley result as a Doppler effect using absolute space-time is examined. It is shown that Doppler effects involve two wave velocities: (1) the phase velocity, which is used to account for the Michelson-Morley null result, and (2) the velocity of energy propagation, which, being fixed relative to absolute space, may be used to explain the results of Roemer, Bradley, Sagnac, Marinov, and the 2.7 degrees K anisotropy.
  • We report relativity tests based on data from two simultaneous Michelson-Morley experiments, spanning a period of more than 1 yr. Both were actively rotated on turntables. One (in Berlin, Germany) uses optical Fabry-Perot resonators made of fused silica; the other (in Perth, Australia) uses microwave whispering-gallery sapphire resonators. Within the standard model extension, we obtain simultaneous limits on Lorentz violation for electrons (5 coefficients) and photons (8) at levels down to 10{sup -16}, improved by factors between 3 and 50 compared to previous work.
  • We present a theoretical analysis of signals for CPT and Lorentz violation in g-2 and charge-to-mass-ratio experiments on electrons and positrons in Penning traps. Experiments measuring anomaly frequencies are found to be the most sensitive to CPT violation. We find that the conventional figure of merit for CPT breaking, involving the difference of the electron and positron g factors, in inappropriate in this context, and an alternative is introduced. Bounds of approximately 10{sup -20} are attainable.