Deviations from Einstein's Gravity at Large and Short Distances

TL;DR

This paper discusses recent experimental efforts to detect deviations from Einstein's gravity at both large and very short distances, focusing on scalar gravitational radiation and small-scale gravity tests.

Contribution

It introduces new experimental approaches and reviews challenges in detecting deviations from Einstein's gravity at different distance scales.

Findings

Resonant mass detectors can be sensitive to scalar gravitational radiation.

Experiments at sub-centimeter scales face significant technical difficulties.

Potential deviations from Einstein's gravity could be observed with improved experimental setups.

Abstract

In this talk I will describe some recent results on the sensitivity of resonant mass detectors shaped as a hollow sphere to scalar gravitational radiation. Detection of this type of gravitational radiation will signal deviations from Einstein's gravity at large distances. I will then discuss a class of experiments aiming at finding deviations from Einstein's gravity at distances below 1 cm. I will review the main experimental difficulties in performing such experiments and evaluate the effects to be taken in account.