Quantum communications get added dimensions, thanks to microlaser chip

https://www.laserfocusworld.com/lasers-sources/article/14287724/quantum-communications-get-added-dimensions-thanks-to-microlaser-chip

"doubles quantum information space improving security and robustness... microlaser chip; two same-sized micro-ring resonators on III-V semiconductor platform... Each ring resonator hosts clockwise and counterclockwise propagating modes... any states within 4D angular momentum space easily generated by controlling optical pump... scalable and compact, easy to deploy on communication satellites or towers, satellite-to-Earth communications and tower-to-tower communications... high-capacity, noise-resilient"

Related: Detecting manipulations in microchips

https://techxplore.com/news/2023-03-microchips.html