Search for Lorentz violation in short-range gravity

TL;DR

This paper reports an experimental search for Lorentz violation in short-range gravity, setting new limits on quadratic curvature couplings with no observed effect at the specified sensitivity.

Contribution

It provides the first experimental constraints on Lorentz violation involving quadratic Riemann curvature couplings in short-range gravity.

Findings

No Lorentz violation detected at the level of 10^{-7} m^2

Set the first experimental limits on quadratic curvature couplings

Improved constraints on Lorentz symmetry in gravity

Abstract

A search for sidereal variations in the force between two planar tungsten oscillators separated by about 80 microns sets the first experimental limits on Lorentz violation involving quadratic couplings of the Riemann curvature, consistent with no effect at the level of $10^{-7}$ m$^2$.