Quantum gravity as a communication resource

It has been theorized that when a quantum communication protocol takes place near a black hole, the spacetime structure induced by the black hole causes an inescapable and fundamental degradation in the protocol's performance compared to if the protocol took place in flat spacetime. This is due to quantum information beyond the event horizon being inaccessible, introducing noise and degrading the entanglement resources of the protocol. However, despite black holes being a place where we expect quantum gravity to be integral, it has been assumed in these results that the black hole is a classical object with a classical spacetime. We show that when the quantum nature of a black hole and its spacetime are taken into account, their quantum properties can be used as resources to allay the degradation of entanglement caused by the event horizon, and thus improve the performance of quantum communication protocols near black holes. Investigating the resourceful nature of quantum gravity could be useful in better understanding the fundamental features of quantum gravity, just as the resourcefulness of quantum theory has revealed new insights into its foundations.