Photon time bins and signal stability show promise for practical quantum communication via fiber optics

https://phys.org/news/2025-07-photon-bins-stability-quantum-communication.html

"each photon carry more information/ signals remain stable across 100s km fiber-optic... photons encoded in delicate quantum states so intercept/ tamper disturbs quantum state, making eavesdropping detectable/ inherently limited... 8 time-bins, which can be opened simultaneously, encoding: information carried by precise arrival time of each photon... silicon nitride photonic chip integrates miniature interferometers generating/ processing entangled photons... sum-frequency correlation tracks joint photons arrival time"