Sending-or-not-sending twin-field quantum key distribution: Breaking the direct transmission key rate

Xu, Hai1; Yu, Zong-Wen1,3; Jiang, Cong1; Hu, Xiao-Long1; Wang, Xiang-Bin1,2,4,5,6,7

2020-04-24

10.1103/PhysRevA.101.042330

PHYSICAL REVIEW A   影响因子和分区

2469-9926

2469-9934

We present improved results of sending-or-not-sending twin-field quantum key distribution by using error rejection through two-way classical communications. Our error rejection method, especially our method of actively odd-parity pairing (AOPP) can drastically improve the performance of sending-or-not-sending twin-field protocol in both secure distance and key rate. Taking a typical experimental parameter setting, our method here improves the secure distance by 70 km to more than 100 km in comparison with the prior art results. Comparative study also shows advantageous in key rates at regime of long distance and large misalignment error rate for our method here. The numerical results show that our method here can significantly exceed the absolute limit of direct transmission key rate, and also have an advantageous key rates higher than various prior art results by 10 to 20 times.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[11474182] ; National Natural Science Foundation of China[11774198] ; National Natural Science Foundation of China[U1738142]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000528504300001

AMER PHYSICAL SOC

20202108694825

Numerical methods ; Errors ; Transmissions

Mechanical Transmissions:602.2 ; Numerical Methods:921.6

PHYSICS

Web of Science

1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Univ Sci & Technol China, CAS Ctr Excellence & Synerget Innovat Ctr Quantum, Shanghai Branch, Shanghai 201315, Peoples R China
3.Data Commun Sci & Technol Res Inst, Beijing 100191, Peoples R China
4.SAICT, Jinan Inst Quantum Technol, Jinan 250101, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
6.Southern Univ Sci & Technol, Phys Dept, Shenzhen 518055, Peoples R China
7.Tsinghua Univ, Ctr Atom & Mol Nanosci, Beijing 100084, Peoples R China

Xu, Hai,Yu, Zong-Wen,Jiang, Cong,et al. Sending-or-not-sending twin-field quantum key distribution: Breaking the direct transmission key rate[J]. PHYSICAL REVIEW A,2020,101(4).

Xu, Hai,Yu, Zong-Wen,Jiang, Cong,Hu, Xiao-Long,&Wang, Xiang-Bin.(2020).Sending-or-not-sending twin-field quantum key distribution: Breaking the direct transmission key rate.PHYSICAL REVIEW A,101(4).

Xu, Hai,et al."Sending-or-not-sending twin-field quantum key distribution: Breaking the direct transmission key rate".PHYSICAL REVIEW A 101.4(2020).