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 Schrödinger 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.

arXiv:2508.03052 [quant-ph]

(or arXiv:2508.03052v4 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2508.03052 Focus to learn more arXiv-issued DOI via DataCite

Phys. Rev. D 113, 085004 (2026)

https://doi.org/10.1103/87dc-qt73 Focus to learn more DOI(s) linking to related resources

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