Quantiky

China’s quantum satellite achieves ‘spooky action’ at record distance

https://www.sciencemag.org/news/2017/06/china-s-quantum-satellite-achieves-spooky-action-record-distance

Quantum entanglement—physics at its strangest—has moved out of this world and into space. In a study that shows China's growing mastery of both the quantum world and space science, a team of physicists reports that it sent eerily intertwined quantum particles from a satellite to ground stations separated by 1200 kilometers, smashing the previous world record. The result is a stepping stone to ultrasecure communication networks and, eventually, a space-based quantum internet.

"Drone-based entanglement distribution towards mobile quantum networks"
https://academic.oup.com/nsr/article/7/5/921/5695761

Figure : Schematic of a scalable quantum network with drone-based link nodes. (a) Illustrative scheme for a drone-based mobile quantum network
from local- to wide-area scales. The local-area network can be established with the plug-and-play drone nodes for fast connection with ground stations,
while the wide-area network can be formed by high-altitude UAVs in cascade and connection with existing quantum satellites and ground fiber-based
networks. (b) Diffraction loss in a local-area network with small lens diameters that are acceptable on small drones. (c) Diffraction loss as a function
of the lens diameter at 100-m link distances, as used in our experiment. (d) Diffraction loss in a wide-area network. Up to 300-km link distances can be
expected with reasonable loss and lens diameters using high-altitude UAVs.