"Secure Metropolitan Quantum Networks Move a Step Closer"

A team of Chinese researchers have made an advancement in quantum communication in which they performed continuous-variable quantum key distribution (CV-QKD) over commercial fiber networks at a significantly longer transmission distance than previously demonstrated. A longer transmission distance over commercial fiber networks indicates that CV-QKD has the potential to be performed in metropolitan areas via current technologies. CV-QKD can enhance the security of people's data such as passwords, email, and more. This article continues to discuss the recent advancement in CV-QKD, previous demonstrations of long-distance CV-QKD, and challenges associated with bringing a practical CV-QKD system to the real world. 

Phys.org reports "Secure Metropolitan Quantum Networks Move a Step Closer"