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Testing Local Lorentz and Position Invariance and Variation of Fundamental Constants by searching the Derivative of the Comparison Frequency Between a Cryogenic Sapphire Oscillator and Hydrogen Maser
Michael Edmund Tobar, Peter Wolf, Sebastien Bize +2
The cryogenic sapphire oscillator (CSO) at the Paris Observatory has been continuously compared to various Hydrogen Masers since 2001. The early data sets were used to test Local L…
Rotating Odd-Parity Lorentz Invariance Test in Electrodynamics
Michael E. Tobar, Eugene N. Ivanov, Paul L. Stanwix +2
We report the first operation of a rotating odd-parity Lorentz Invariance test in electrodynamics using a microwave Mach-Zehnder interferometer with permeable material in one arm.…
Observation of persistent photoconductivity in bulk Gallium Arsenide and Gallium Phosphide samples at cryogenic temperatures using the Whispering Gallery mode method
J. G. Hartnett, D. Mouneyrac, J. -M. Le Floch +3
Whispering Gallery modes in bulk cylindrical Gallium Arsenide and Gallium Phosphide samples have been examined both in darkness and under white light at cryogenics temperatures < 5…
Modified permittivity observed in bulk Gallium Arsenide and Gallium Phosphide samples at 50 K using the Whispering Gallery mode method
J. G. Hartnett, D. Mouneyrac, J-M. Le Floch +3
Whispering Gallery modes in bulk cylindrical Gallium Arsenide and Gallium Phosphide samples have been examined both in darkness and under white light at 50 K. In both samples we ob…
Creating traveling waves from standing waves from the gyrotropic paramagnetic properties of Fe ions in a high-Q whispering gallery mode sapphire resonator
Karim Benmessai, Michael Edmund Tobar, Nicholas Bazin +3
We report observations of the gyrotropic change in magnetic susceptibility of the Fe electron paramagnetic resonance at 12.037GHz (between spin states and ) i…
Microwave Phase Detection at the Level of rad
Eugene Nicolay Ivanov, Michael Edmund Tobar
We report on a noise measurement system with the highest spectral resolution ever achieved in the microwave domain. It is capable of detecting the phase fluctuations of ampli…