In a recent New J. Physics article, we look at how one could create entanglement between two remote parties by generating, and then almost entirely consuming, a topological code state spread over any number of repeater stations. The approach tolerates 10% noise on the links between stations.
It’s a scheme that calls for a fair bit of sophistication in the repeater stations, but an upside is that it scales with distance very well – potentially making secure communication over arbitrary distances possible.
This work involves QuNaT associate Ying Li and Simon Benjamin.