Gravity entanglement, quantum reference systems, degrees of freedom

Abstract Gravity mediated entanglement (GME) has been proposed as the first experimentally testable signature of quantum gravity. However, to what extent effect is due gravity under debate. In this note, we argue in several ways that observation GME does indeed tell us something new about compared previous experiments. particular, consider a reference frame treatment experiment allows pinpoint single degree freedom responsible for effect. We also discuss relevance Newtonian limit, longitudinal/transverse decomposition field, and local operations classical communication theorem. Our conclusion experiments trying detect would be interesting because (a) either positive or negative results able falsify theories (b) represent truly novel.