Limitation of decoy-state Scarani-Acin-Ribordy-Gisin quantum-key-distribution protocols with a heralded single-photon source

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.044304· OSTI ID:21020848

Shengli, Zhang ^[1]; Xubo, Zou; Ke, Li; Guangcan, Guo ^[1]; Chenhui, Jin ^[2]

---

1. Key Laboratory of Quantum Information, University of Science and Technology of China (CAS), Hefei 230026 (China)
2. Electronic Technology Institute, Information Engineering University, Zhengzhou, Henan 450004 (China)

For the Bennett-Brassard 1984 (BB84) quantum key distribution, longer distance and higher key generating rate is shown with a heralded single-photon source (HSPS) [Phys. Rev. A. 73, 032331 (2006)]. In this paper, the performance of the Scarani-Acin-Ribordy-Gisim (SARG) protocol utilizing the HSPS sources is considered and the numerical simulation turns out that still a significant improvement in secret key generating rate can also be observed. It is shown that the security distance for HSPS+SARG is 120 km. However, compared with the HSPS+BB84 protocols, the HSPS+SARG protocol has a lower secret key rate and a shorter distance. Thus we show the HSPS+BB84 implementation is a preferable protocol for long distance transmittance.

• OSTI ID: 21020848
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION
NUMERICAL ANALYSIS
PERFORMANCE
PHONONS
PHOTONS
QUANTUM CRYPTOGRAPHY
QUANTUM INFORMATION
SECURITY
SIMULATION