Existing experiments suffice to indirectly verify the quantum essence of gravity. – ( Martin Plavala/ LCAR / Seminar). – 7/05/2026, 11H

Séminaire LCAR

Martin Plavala, Institut für Theoretische Physik, Leibniz Universität Hannover, Hannover, Germany

Summary
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 out current technological capability, with optimistic projections placing the experiment outside of 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.