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arXiv · 2508.03052

Existing experiments suffice to indirectly verify the quantum essence of gravity

Martin Plávala
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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.

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Martin Plávala. 2025-08-05. Existing experiments suffice to indirectly verify the quantum essence of gravity. https://doi.org/10.1103/87dc-qt73

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