Comment on "Using an atom interferometer to infer gravitational entanglement generation''

TL;DR

This paper addresses a technical error in a previous work on using atom interferometers for gravitational entanglement, analyzing its impact and proposing solutions to strengthen the experimental approach.

Contribution

It clarifies the nature of the error in the prior proposal and offers methods to mitigate its effects, improving the robustness of gravitational entanglement experiments.

Findings

Identification of a key technical error in the previous proposal

Analysis of how the error affects experimental conclusions

Proposed methods to overcome the identified weakness

Abstract

Our paper arXiv:2101.11629 contains a technical error which changes some of the conclusions. We thank Streltsov, Pedernales, and Plenio for bringing the essence of this error to our attention. Here we explain the error, examine its consequences, and suggest methods to overcome the resulting weakness in the proposed experiment.