摘要
报道了可光纤集成相干态量子身份认证实验系统。该系统采用偏振相干态的斯托克斯矢量作为量子信号载体,采用动态偏振控制器作为信号调制器,利用固有的相干态量子噪声保证系统的安全性。自行设计了脉冲激光驱动电路、微弱窄脉冲激光探测电路、信号同步模块,采用Socket网络通信程序在TCP/IP局域网中实现了量子保密通信所需要的经典通信。该相干态量子身份认证系统采用的运行密钥为12位,每个光脉冲包含40000个光子,传输速率达到8kbit/s,合法用户间误码率(BER)小于10-4。每传输一个比特信息,攻击者所能窃取的信息量I(Alice,Eve)<10-14bit。
An integrable optic-fiber coherent state quantum identification system is presented. In the scheme, the Stokes vectors of polarization coherent state are employed as quantum signal carrier, the dynamic polarization controller serves as a modulation device, and the inherent quantum noise guarantees the security. The driving circuit of laser pulses, detection circuit for weak narrow laser pulses, and signal synchronous module, are self-designed. Classical communication needed by quantum secret communication is implemented by Socket network communication program running on the TCP/IP local area network. The running key employed in the system is 12 bit. The transmission rate of identity picture is 8 kbit/s, the bit error rate between legal users is less than 10^-4, and the information/（Alice,Eve） per bit obtained by an attacker is less than 10^-14.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2007年第7期924-929,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(60472018)
2006年度上海交通大学青年教师校内科研启动基金(A2831B)
"十一五"国防基础科研项目(A3220061163)
上海交通大学第11期PRP项目(T03011030)资助课题
关键词
量子光学
量子密码
量子身份认证
动态偏振控制器
相干态量子噪声
quantum optics
quantum cryptography
quantum identification
dynamic polarization controller
quantum noise of coherent state
