Quantum gravity could be probed by entangled masses
http://physicsworld.com/cws/article/news/2018/jan/15/quantum-gravity-could-be-probed-by-entangled-masses
I have described the relationship between quantum gravity and quantum entanglement, before. See:
Connection between quantum gravity and entanglement
https://www.researchgate.net/publication/315572721_Connection_between_quantum_gravity_and_entanglement