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Related Experiment Videos

Modern Michelson-Morley experiment using cryogenic optical resonators.

Holger Müller1, Sven Herrmann, Claus Braxmaier

  • 1Institut für Physik, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin, Germany. holger.mueller@physik.hu-berlin.de

Physical Review Letters
|August 9, 2003
PubMed
Summary

This study tested Lorentz invariance using cryogenic optical resonators, finding no significant violation of the speed of light. The results provide stringent new limits on fundamental physics parameters, improving on previous measurements.

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Area of Science:

  • Fundamental Physics
  • Tests of Relativity
  • Precision Measurements

Background:

  • Lorentz invariance is a cornerstone of modern physics, asserting the constancy of the speed of light.
  • Deviations from Lorentz invariance could indicate new physics beyond the Standard Model.
  • Previous experiments have placed stringent limits on such potential violations.

Purpose of the Study:

  • To perform a novel test of Lorentz invariance using high-precision cryogenic optical resonators.
  • To search for potential anisotropy in the speed of light.
  • To constrain parameters within extensions of the Standard Model and Robertson-Mansouri-Sexl test theory.

Main Methods:

  • Comparison of resonance frequencies of two orthogonal cryogenic optical resonators.

Related Experiment Videos

  • Utilizing Earth's rotation over approximately one year to probe for anisotropy.
  • Analysis within the framework of the Robertson-Mansouri-Sexl (RMS) test theory and general Standard Model extensions.

    • Main Results:

    • A new upper limit on the anisotropy of the speed of light: Delta(theta)c/c(0)=(2.6+/-1.7)x10(-15).
    • Constrained the isotropy violation parameter beta-delta-1 / 2 to (-2.2+/-1.5)x10(-9), a threefold improvement over prior results.
    • Set new limits on seven parameters in extensions of the Standard Model, reaching accuracies down to 10(-15), a two-order-of-magnitude improvement.

    Conclusions:

    • The experiment provides one of the most precise tests of Lorentz invariance to date.
    • The results place significant constraints on theories predicting violations of fundamental symmetries.
    • This work advances our understanding of fundamental physics and opens avenues for future precision measurements.