Entanglement of Separate Nanomechanical Devices Heralds Quantum Internet
The strange laws of quantum mechanics make it possible to send information from one part of the universe to another with perfect privacy. Eavesdroppers cannot spy on this communication, even in principle. So governments, the military, banks, and others are eagerly awaiting improvements in this kind of technology.
Indeed, a basic version is already available. Current quantum communication systems rely on direct optical-fiber connections from one place to another. But because fibers absorb light, this limits the distance quantum information can be sent to a couple of hundred kilometers.