摘要
文中提出一种利用单模正交压缩态光场作为密码载体的连续变量量子密钥传输方案。在该方案中 ,经典信号以二进制编码形式调制在单模正交压缩态光场的正交振幅分量或正交位相分量上。基于海森堡测不准关系 ,任何窃听都会导致合法通讯者之间的误码率升高 ,从而暴露了窃听者的存在 ,以保护密钥信息的安全 ,与采用同样方案的相干光相比 。
Scheme of quantum cryptography based on single mode quadrature phase and amplitude squeezed state lights is presented. The binary key is obtained by modulating the phase quadrature or amplitude quadrature of the quadrature squeezed coherent state. The uncertainty relation of quantum mechanics provides the quantum protection. Eavesdropping from optical tapping will degrade the signal to noise ratio of the results measured by the authorized receiver and hence be revealed. Comparing with that using a coherent state light, the application of the squeezed state light enhances the security significantly.
出处
《量子光学学报》
CSCD
2002年第2期71-75,共5页
Journal of Quantum Optics
基金
国家自然科学基金 (6 99380 10 )
山西省留学回国人员基金
山西省自然科学基金
