328 citations · 1.4k across the 14 of their papers we have counts for
14 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…
Testing local position and fundamental constant invariance due to periodic gravitation and boost using long-term comparison of the SYRTE atomic fountains and H-masers
M. E. Tobar, P. L. Stanwix, J. J. McFerran +8
The frequencies of three separate Cs fountain clocks and one Rb fountain clock have been compared to various hydrogen masers to search for periodic changes correlated with the chan…
Magnetic field imaging with NV ensembles
L. M. Pham, D. Le Sage, P. L. Stanwix +9
We demonstrate a method of imaging spatially varying magnetic fields using a thin layer of nitrogen-vacancy (NV) centers at the surface of a diamond chip. Fluorescence emitted by t…
Cavity Bounds on Higher-Order Lorentz-Violating Coefficients
Stephen R. Parker, Matthew Mewes, Michael E. Tobar +1
We determine the sensitivity of a modern Michelson-Morley resonant-cavity experiment to the higher-order nonbirefringent and nondispersive coefficients of the Lorentz-violating Sta…
Improved Constraints on Isotropic Shift and Anisotropies of the Speed of Light using Rotating Cryogenic Sapphire Oscillators
Michael A. Hohensee, Paul. L. Stanwix, Michael Edmund Tobar +3
We demonstrate that Michelson-Morley tests, which detect direction-dependent anisotropies in the speed of light, can also be used to place limits upon isotropic deviations of the v…
Coherence of Nitrogen-Vacancy Electronic Spin Ensembles in Diamond
P. L. Stanwix, L. M. Pham, J. R. Maze +7
We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature.…