中药玄精石的物相与结构分析

中药玄精石的物相与结构分析;中药; 玄精石; X射线衍射; 晶粒尺寸; 微量元素; 热分析     

Security of biased BB84 quantum key distribution with finite resource

In the original BB84 quantum key distribution protocol, the states are prepared and measured randomly, which lose the unmatched detection results. To improve the sifting efficiency, biased bases selection BB84 protocol is proposed. Meanwhile, a practical quantum key distribution protocol can only transmit a finite number of signals, resulting in keys of finite length. The previous techniques for finite-key analysis focus mainly on the statistical fluctuations of the error rates and yields of the qubits. However, the prior choice probabilities of the two bases also have fluctuations by taking into account the finite-size effect. In this paper, we discuss the security of biased decoy state BB84 protocol with finite resources by considering all of the statistical fluctuations. The results can be directly used in the experimental realizations.     

生、煅磁石的分析与比较

生、煅磁石的分析与比较;中药;磁石;X射线粉末衍射;扫描电镜;微量元素