Reginatto, MarcelHall, MichaelIOP Science2020-06-292020-06-291742-6588http://hdl.handle.net/1885/205592We consider the coupling of quantum fields to classical gravity in the formalism of ensembles on configuration space, a model that allows a consistent formulation of interacting classical and quantum systems. Explicit calculations show that there are solutions for which two initially independent quantum fields evolve into an entangled state, even though their interaction occurs solely via a common classical gravitational field. Thus in contrast to recent suggestions, an observed generation of entanglement would not provide a definitive test of the nonclassical nature of gravity.11 pagesapplication/pdfen-AU© IOP Publishing Ltd 2019https://creativecommons.org/licenses/by/3.0/2019-09-0110.1088/1742-6596/1275/1/0120392020-01-19Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.