More on quantum secure communications.
Quantum communication demonstrated by two hovering drones By Luke Dormehl, January 19, 2021 in DigitalTrends
The groundwork is being laid for the quantum internet — up in the air. Recently, researchers from Nanjing University in China demonstrated that it is possible to send entangled photons between a pair of drones, called Alice and Bob, hovering one kilometer apart.
This was done by using an onboard laser and crystal to split a single photon into a pair of entangled photons, with one sent to a ground station and the other to the other drone. Motorized devices on the drones made sure that the receivers and transmitters were in alignment with one another.
Distance quantum communication, which could make for more quantum secure networks built on quantum encryption, has been demonstrated before, between satellites and ground stations. However, this demo showed that it can also work using comparatively cheap hardware between shorter distances. As New Scientist pointed out, this is the first time that such photon entanglement has been shown to work between two moving objects. ... '
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