Chinese researchers have for the first time internationally implemented drone-based quantum entanglement distribution, filling a gap in the field, according to research published in the prestigious journal National Science Review. It is reported that the Team of Zhu Shining, Xie Yanda and Yan Xiao of Nanjing University developed the quantum distribution system for the drone over two years.
In the experiment, an eight-axis rotary-wing drone, carrying a quantum communication system weighing about 10 kilograms, launched a pair of entangled photons at an altitude of several tens of meters to two portable ground stations 100 meters away, all of which arrived almost intact.
The measurement results show that the Bell inequality S value of A and B two photon entangled states reached 2.49, and the distribution of quantum entanglement was successful.
In addition, the UAV carries a net weight of only 468 grams of entangled light source, a more than one quantity lighter than conventional technology, but the efficiency is still very high, can produce 2.4 million pairs of entangled photons per second.
Some commentators point out that quantum communications ” the next best option may be relatively inexpensive drones”.
Quantum entanglement is a singular phenomenon of quantum mechanics in which two photons in an entangled state are related no matter how far apart, one of which changes the quantum state and the other changes instantaneously.