Sending-or-not-sending quantum key distribution with phase postselection
Creators
- 1. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China
- 2. CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- 3. Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
Description
Quantum key distribution (QKD) could help to share a secure key between two distant peers. In recent years, twin-field (TF) QKD has been widely investigated because of its long transmission distance. One of the popular variants of TF QKD is sending-or-not-sending (SNS) QKD, which has been experimentally verified to realize 1000-km level fiber key distribution. In this article, we introduce phase postselection into the SNS protocol. With this modification, the probability of selecting "sending" can be substantially improved. The numerical simulation shows that the transmission distance can be improved both with and without the actively odd-parity pairing method. The case of discrete phase randomization is also analyzed, a similar improvement on distance can be seen.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevApplied.22.024056;
- arXiv
- arXiv:2401.02304;
- Crossref Funder ID
- 10.13039/501100012166; 10.13039/501100001809; 10.13039/501100003995; 10.13039/501100002858;
Publishing Information
- Journal Title
- Physical Review Applied
- Journal Volume
- 22
- Journal Issue
- 2
- Journal Page Range
- 13 pgs.
- ISSN
- 2331-7019
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S97: MATHEMATICAL METHODS AND COMPUTING;
- Descriptors DEI
- COMPUTERIZED SIMULATION; DATA TRANSMISSION; DISTANCE; DISTRIBUTION; INFORMATION THEORY; MODIFICATIONS; OPTICAL FIBERS; PARITY; PROBABILITY; QUANTUM COMPUTERS; QUANTUM CRYPTOGRAPHY; QUANTUM INFORMATION; QUANTUM MECHANICS; QUANTUM OPTICS; TRANSMISSION
- Descriptors DEC
- COMMUNICATIONS; COMPUTERS; CRYPTOGRAPHY; FIBERS; INFORMATION; MECHANICS; OPTICS; PARTICLE PROPERTIES; SIMULATION
Optional Information
- Copyright
- © 2024 American Physical Society
- Contract/Grant/Project number
- 2020YFA0309802; 62171424; 62271463; 62301524; 2308085QF216; 2022M723064; BE2022071; 2021ZD0300701
- Notes
- Contact Email: Contact author: yinzq@ustc.edu.cn; Contact Email: Contact author: wshuang@ustc.edu.cn; Record automatically processed
- Funding organization
- National Key Research and Development Program of China; National Natural Science Foundation of China; Natural Science Foundation of Anhui; China Postdoctoral Science Foundation; Jiangsu provincial key R & D Program; Central Universities, the Innovation Program for Quantum Science and Technology