We study how quantum systems can harvest entanglement from the quantum
degrees of freedom of the gravitational field. Concretely, we describe in
detail the interaction of non-relativistic quantum systems with linearized
quantum gravity, and explore how two spacelike separated probes can harvest
entanglement from the gravitational field in this context. We provide estimates
for the harvested entanglement for realistic probes which can be experimentally
relevant in the future, since entanglement harvesting experiments can provide
evidence for the existence of quantum degrees of freedom of gravity.
