Continuous variable quantum key distribution

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum key distribution continuous variable quantum optics quantum communication
• 年，卷（期）: 2017,（4）
• 页码范围: 102-108
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/4/040303

摘要

Quantum key distribution enables unconditionally secure key distribution between two legitimate users.The information-theoretic security is guaranteed by the fundamental laws of quantum physics.Initially,the quantum key distribution protocol was proposed based on the qubits.Later on,it was found that quantum continuous variables can also be exploited for this target.The continuous variable quantum key distribution can build upon standard telecommunication technology and exhibits a higher secret key rate per pulse at a relatively short distance due to the possibility of encoding more than 1 bit per pulse.In this article,we review the current status of the continuous variable quantum key distribution research,including its basic principle,experimental implementations,security and future directions;the experimental progress in this field made by our group is also presented.