Non-Gaussian postselection and virtual photon subtraction in   continuous-variable quantum key distribution

doi:10.1103/PhysRevA.93.012310

CORC > 北京大学 > 信息科学技术学院

	Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution
	Li, Zhengyu ; Zhang, Yichen ; Wang, Xiangyu ; Xu, Bingjie ; Peng, Xiang ; Guo, Hong
刊名	PHYSICAL REVIEW A
	2016
关键词	NOISELESS LINEAR AMPLIFICATION INFORMATION STATES
DOI	10.1103/PhysRevA.93.012310
英文摘要	Photon subtraction can enhance the performance of continuous-variable quantum key distribution (CV QKD). However, the enhancement effect will be reduced by the imperfections of practical devices, especially the limited efficiency of a single-photon detector. In this paper, we propose a non-Gaussian postselection method to emulate the photon substraction used in coherent-state CV QKD protocols. The virtual photon subtraction not only can avoid the complexity and imperfections of a practical photon-subtraction operation, which extends the secure transmission distance as the ideal case does, but also can be adjusted flexibly according to the channel parameters to optimize the performance. Furthermore, our preliminary tests on the information reconciliation suggest that in the low signal-to-noise ratio regime, the performance of reconciliating the postselected non-Gaussian data is better than that of the Gaussian data, which implies the feasibility of implementing this method practically.; National Science Fund for Distinguished Young Scholars of China [61225003]; State Key Project of National Natural Science Foundation of China [61531003]; National Natural Science Foundation of China [61501414]; National Hi-Tech Research and Development (863) Program; SCI(E); ARTICLE; xiangpeng@pku.edu.cn; hongguo@pku.edu.cn; 1; 93
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438823]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Li, Zhengyu,Zhang, Yichen,Wang, Xiangyu,et al. Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution[J]. PHYSICAL REVIEW A,2016.
APA	Li, Zhengyu,Zhang, Yichen,Wang, Xiangyu,Xu, Bingjie,Peng, Xiang,&Guo, Hong.(2016).Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution.PHYSICAL REVIEW A.
MLA	Li, Zhengyu,et al."Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution".PHYSICAL REVIEW A (2016).