Hey tech enthusiasts! 🚀 A groundbreaking milestone has been reached by a Chinese team from Shanghai Jiao Tong University. They have built a 300-km quantum secure direct communication (QSDC) network that maintains over 85% quantum state fidelity even in noisy environments.
This new achievement follows an earlier record‐setting 104.8-km test by a Beijing team using standard optical fiber, and it pushes the envelope with a stable photon pair rate of 300 to 400 Hz. With this innovative double-pumped and fully connected QSDC network, secure data transmission is now becoming a practical reality for fields like finance where top-level security is essential.
Quantum direct communication, originally proposed by researchers from Tsinghua University, offers built-in eavesdropping detection and covert transmission. Coupled with advances in quantum key distribution – recently demonstrated in a 12,900-km satellite test connecting China and South Africa – these breakthroughs are paving the way for a future global quantum internet.
Exciting times are ahead as these quantum innovations highlight a major leap toward ultra-secure communications. Stay tuned for more updates on this quantum revolution!
Reference(s):
cgtn.com
