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Humboldt-Universität zu Berlin - Faculty of Mathematics and Natural Sciences - Optical Metrology

Humboldt-Universität zu Berlin | Faculty of Mathematics and Natural Sciences | Department of Physics | Optical Metrology | Publications | Electromagnetic cavity tests of Lorentz invariance on Earth and in space

M. Nagel, K. Möhle, K. Döringshoff, E. V Kovalchuk, and A. Peters (2011)

Electromagnetic cavity tests of Lorentz invariance on Earth and in space

Proceedings of the 46th Rencontres de Moriond and GPhyS Colloquium on Gravitational Waves and Experimental Gravity, La Thuile, Italy:357-361.

We present a Michelson-Morley type experiment for testing the isotropy of the speed of light in vacuum and matter. The experiment compares the resonance frequency of an actively rotated monolithic optical cryogenic sapphire resonator against the resonance frequency of a stationary evacuated optical cavity made of ultra-low-expansion glass. The results yield an upper limit for the anisotropy of the speed of light in matter (sapphire) of Delta(c)/c < 1 x 10^-16, limited by the frequency stability of the sapphire resonator.