Existing experiments suffice to indirectly verify the quantum essence of gravity
Abstract
The gravity-mediated entanglement experiments employ concepts from quantum information to argue that if entanglement due to gravitational interaction is observed, then gravity cannot be described by a classical system. However, the proposed experiments remain beyond our current technological capability, with optimistic projections placing the experiment outside of the short-term future. Here we argue that current matter-wave interferometers are sufficient to indirectly prove that gravitational interaction creates entanglement between two systems. Specifically, we prove that if we experimentally verify the Schr\"odinger equation for a single delocalized system interacting gravitationally with an external mass, then, under one of two reasonable assumptions, the time evolution of two delocalized systems will lead to gravity-mediated entanglement.
Keywords
Cite
@article{arxiv.2508.03052,
title = {Existing experiments suffice to indirectly verify the quantum essence of gravity},
author = {Martin Plávala},
journal= {arXiv preprint arXiv:2508.03052},
year = {2026}
}