Hybrid quantum networks: a bottom-up perspective

Quantum networks are now starting to appear around the world, but most of these are focused solely on optical fiber channels. Just as our classical communications are based on a hybrid wired and wireless communication infrastructure, so too will an eventual quantum network depend on both fiber and free-space links. The latter will allow communications to fixed structures (the 'last mile' problem) as well as a variety of mobile platforms, e.g., cars, drones, and satellites. Here we will discuss our current efforts to develop and deploy the relevant quantum technologies.