Improving Continuous-Variable Quantum Key Distribution in a Turbulent Atmospheric Channel via Photon Subtraction

被引：1
|
作者：
Peng, Qingquan [1 ]
Liao, Qin [2 ]
Guo, Ying [1 ,3 ]
机构：
[1] Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
[2] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China
[3] Wuxi Taihu Univ, Jiangsu Key Construct Lab IoT Applicat Technol, Wuxi 214064, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2020年 / 59卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Continuous variable quantum key distribution; Photon subtraction operation; A turbulent atmospheric channel; ENTANGLEMENT; COMMUNICATION; CRYPTOGRAPHY; DAYLIGHT;
D O I：
10.1007/s10773-019-04327-w
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The transmission performance of continuous-variable quantum key distribution (CVQKD) in turbulent atmospheric channel is lower than CVQKD in fiber channel due to the large loss of quantum entanglement in turbulent atmospheric channel. In this paper, we propose a new approach to prolong the transmission performance of CVQKD in a turbulent atmospheric channel by using photon subtraction operation since the proposed approach can effectively enhance the entangled state between quantum. Simulation analysis shows that photon subtraction operation can effectively improve the security key rate of continuous-variable quantum key distribution, and the optimal performance can be achieved when only one photon is subtracted.
引用
收藏
页码：338 / 349
页数：12
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