189 citations · 325 across the 7 of their papers we have counts for
7 papers
Direct Terrestrial Test of Lorentz Symmetry in Electrodynamics to 10
M. Nagel, S. R. Parker, E. V. Kovalchuk +5
Lorentz symmetry is a foundational property of modern physics, underlying the standard model of particles and general relativity. It is anticipated that these two theories are low…
Ultra-stable cryogenic optical resonators for tests of fundamental physics
M. Nagel, K. Möhle, K. Döringshoff +3
We present the design and first measurement results for an ultra-stable cryogenically cooled optical sapphire resonator system with a potential relative frequency stability better…
Highly stable piezoelectrically tunable optical cavities
Katharina Möhle, Evgeny V. Kovalchuk, Klaus Döringshoff +2
We have implemented highly stable and tunable frequency references using optical high finesse cavities which incorporate a piezo actuator. As piezo material we used ceramic PZT, cr…
Electromagnetic cavity tests of Lorentz invariance on Earth and in space
M. Nagel, K. Möhle, K. Döringshoff +2
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 ro…
Towards an ultra-stable optical sapphire cavity system for testing Lorentz invariance
M. Nagel, A. Peters
We present a design for an ultra-stable cryogenically cooled sapphire optical cavity system, with fractional frequency stability better than 1 x 10^-16 at one second integration ti…
Testing Lorentz Invariance by Comparing Light Propagation in Vacuum and Matter
M. Nagel, K. Möhle, K. Döringshoff +4
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 a monolithic o…