Comment on "Do Gedankenexperiments compel quantization of gravity"

TL;DR

This paper argues that there is no definitive theoretical reason requiring gravity to be quantized, challenging claims that thought experiments compel such a conclusion.

Contribution

It critically examines recent arguments and demonstrates that the necessity of gravity quantization remains unproven and inconclusive.

Findings

No conclusive theoretical proof for gravity quantization

Recent paradox resolutions do not establish quantization necessity

Efforts to prove the necessity of quantization are inconclusive

Abstract

There is no conclusive theoretical argument that would require the quantization of the gravitational field. A paradox presented by Mari et al. [Sci. Rep. 6, 22777 (2016)] and its resolution by Belenchia et al. [Phys. Rev. D 98, 126009 (2018)] did not change anything about this assertion. Despite being interesting in other respects, efforts of a recent work by Ryding, Aurell, and Pikovski [arXiv:2107.07514] to further establish the inconclusiveness of the question of necessity of quantization are futile.