Squeezed quantum communication: Flashes of light in quantum states transmitted through atmosphere
Wednesday, September 10, 2014 - 03:32
in Physics & Chemistry
Scientists have sent a pulse of bright light in a particularly sensitive quantum state through 1.6 kilometers of air. This quantum state, which they call squeezed, was maintained, which is something many physicists thought to be impossible. Eavesdropping on a message protected by quantum cryptography cannot be done without being noticed.