Quantum holograms can send messages that disappear
Polarised light can make messages encoded in a quantum hologram disappearHong Liang, Wai Chun Wong, Tailin An, Jensen Li 2024
A quantum disappearing act could make it possible to embed secure messages in holograms and selectively erase parts of them even after they have been sent.
Quantum light signals are inherently secure information carriers, as intercepting their messages destroys fragile quantum states that encode them. To take advantage of this without having to use bulky devices, Jensen Li at the University of Exeter in the UK and his colleagues used a metasurface, a 2D material engineered to have special properties, to create quantum holograms.
Holograms encode complex information that can be recovered when illuminated – for instance, a 2D holographic pape...