Quantum-information methods for quantum gravity laboratory-based tests

It is conceptually possible that gravity is a force of nature that is not describable with a classical theory, but is also not described by a conventional quantum theory. Information-theoretic approaches make it possible to address this general idea in a concrete way, with thought experiments that would constrain the scope of whatever new theory emerges. This review gives the status of these new theoretical approaches, with an emphasis on proposed experiments that look for gravitationally induced entanglement (GIE) between two probes for which quantum theory is known to be applicable. Various potentially feasible tabletop-scale GIE experiments that have been proposed are concretely analyzed.