Does gravity have to be quantized? Lessons from non-relativistic toy models
Quantum Physics
2020-01-08 v1 General Relativity and Quantum Cosmology
Abstract
It is often argued that gravity has to be a quantum theory simply because a fundamentally semiclassical approach would necessarily be inconsistent. Here I review recent Newtonian toy models of (stochastic) semiclassical gravity. They provide one option to implement a force semiclassically without getting into the known problems associated with mean-field. These models are not complete theories and should not be considered too seriously, but their consistency shows that semiclassical gravity is hard to dismiss on purely theoretical grounds.
Cite
@article{arxiv.1903.01823,
title = {Does gravity have to be quantized? Lessons from non-relativistic toy models},
author = {Antoine Tilloy},
journal= {arXiv preprint arXiv:1903.01823},
year = {2020}
}
Comments
16 pages -- written for the proceedings of the DICE 2018 workshop in Castiglioncello -- provides a more detailed account of the technical arguments in arXiv:1802.03291