Xuesong Xu

We demonstrate a continuous-variable quantum key distribution system with an integrated silicon photonic receiver, achieving a 1.89 Mbps asymptotic secret key rate over 60 km, enabling metropolitan-area chip-based quantum secure communications.

We develop a chip-based continuous-variable quantum key distribution system using an integrated optical switch for real-time shot noise calibration. Experimental results demonstrate a secure key rate of 12.30 Mbps over 25.3 km, establishing foundational capabilities for practical applications.