I love news items like this. They really don’t get picked up enough by the mainstream media, maybe it’s just too scary or exciting, or just cool to geeks.
Anyway, I talked about this many years ago when teleportation was first demonstrated in Australia. Here’s an update:
Teleporting independent qubits 97 kilometers opens the way to satellite based quantum communications
“Juan Yin at the University of Science and Technology of China in Shanghai, and a bunch of mates say they have teleported entangled photons over a distance of 97 kilometres across a lake in China.
That’s an impressive feat for several reasons. The trick these guys have perfected is to find a way to use a 1.3 Watt laser and some fancy optics to beam the light and receive it.
Inevitably photons get lost and entanglement is destroyed in such a process. Imperfections in the optics and air turbulence account for some of these losses but the biggest problem is beam widening (they did the experiment at an altitude of about 4000 metres). Since the beam spreads out as it travels, many of the photons simply miss the target altogether.
So the most important advance these guys have made is to develop a steering mechanism using a guide laser that keeps the beam precisely on target. As a result, they were able to teleport more than 1100 photons in 4 hours over a distance of 97 kilometres.”
Quantum Object Teleported 100 Kilometers by Chinese Scientists
“Though quantum teleportation has existed for well over 10 years, it has never actually happened at a distance that would be of any use to people in the real world. But for the first time, Chinese researchers were able to teleport a quantum object nearly 100 kilometers, ramping up the real world applications for the idea.”
Live long and prosper.