Improvement of two-way continuous-variable quantum key distribution with   virtual photon subtraction

doi:10.1007/s11128-017-1617-8

CORC > 北京大学 > 信息科学技术学院

	Improvement of two-way continuous-variable quantum key distribution with virtual photon subtraction
	Zhao, Yijia ; Zhang, Yichen ; Li, Zhengyu ; Yu, Song ; Guo, Hong
刊名	QUANTUM INFORMATION PROCESSING
	2017
关键词	Continuous-variable quantum key distribution Two-way protocol Virtual photon subtraction Tolerable excess noise ENTANGLEMENT CRYPTOGRAPHY INFORMATION STATES
DOI	10.1007/s11128-017-1617-8
英文摘要	We propose a method to improve the performance of two-way continuous-variable quantum key distribution protocol by virtual photon subtraction. The virtual photon subtraction implemented via non-Gaussian post-selection not only enhances the entanglement of two-mode squeezed vacuum state but also has advantages in simplifying physical operation and promoting efficiency. In two-way protocol, virtual photon subtraction could be applied on two sources independently. Numerical simulations show that the optimal performance of renovated two-way protocol is obtained with photon subtraction only used by Alice. The transmission distance and tolerable excess noise are improved by using the virtual photon subtraction with appropriate parameters. Moreover, the tolerable excess noise maintains a high value with the increase in distance so that the robustness of two-way continuous-variable quantum key distribution system is significantly improved, especially at long transmission distance.; National Basic Research Program of China (973 Program) [2014CB340102]; National Natural Science Foundation [61225003, 61531003, 61427813, 61401036, 61471051]; SCI(E); ARTICLE; 8; 16
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/462339]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhao, Yijia,Zhang, Yichen,Li, Zhengyu,et al. Improvement of two-way continuous-variable quantum key distribution with virtual photon subtraction[J]. QUANTUM INFORMATION PROCESSING,2017.
APA	Zhao, Yijia,Zhang, Yichen,Li, Zhengyu,Yu, Song,&Guo, Hong.(2017).Improvement of two-way continuous-variable quantum key distribution with virtual photon subtraction.QUANTUM INFORMATION PROCESSING.
MLA	Zhao, Yijia,et al."Improvement of two-way continuous-variable quantum key distribution with virtual photon subtraction".QUANTUM INFORMATION PROCESSING (2017).