On tests of the quantum nature of gravitational interactions in presence of non-linear corrections to quantum mechanics

Author:

Spaventa Giovanni1,Lami Ludovico1234,Plenio Martin B.1

Affiliation:

1. Institute of Theoretical Physics and IQST, Universität Ulm, Albert-Einstein-Allee 11 D-89081, Ulm, Germany

2. QuSoft, Science Park 123, 1098 XG Amsterdam, the Netherlands

3. Korteweg–de Vries Institute for Mathematics, University of Amsterdam, Science Park 105-107, 1098 XG Amsterdam, the Netherlands

4. Institute for Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands

Abstract

When two particles interact primarily through gravity and follow the laws of quantum mechanics, the generation of entanglement is considered a hallmark of the quantum nature of the gravitational interaction. However, we demonstrate that entanglement dynamics can also occur in the presence of a weak quantum interaction and non-linear corrections to local quantum mechanics, even if the gravitational interaction is classical or absent at short distances. This highlights the importance of going beyond entanglement detection to conclusively test the quantum character of gravity, and it requires a thorough examination of the strength of other quantum forces and potential non-linear corrections to quantum mechanics in the realm of large masses.

Funder

DFG via QuantERA ExTRaQT

DFG via QuantERA Lemaqume

Publisher

Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften

Subject

Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics

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