Superconducting-Gravimeter Tests of Local Lorentz Invariance

Superconducting-gravimeter measurements are used to test the local Lorentz invariance of the gravitational interaction and of matter-gravity couplings. The best laboratory sensitivities to date are achieved via a maximum-reach analysis for 13 Lorentz-violating operators, with some improvements exceeding an order of magnitude.

Figure 1

Bad Homburg data taken January 1–3, 2012, before and after tidal model subtraction. Discrete points are plotted that appear as a continuous curve at this scale.