TY - JOUR
T1 - Limitation of decoy-state Scarani-Acin-Ribordy-Gisin quantum-key- distribution protocols with a heralded single-photon source
AU - Zhang, Shengli
AU - Zou, Xubo
AU - Li, Ke
AU - Jin, Chenhui
AU - Guo, Guangcan
PY - 2007/10/8
Y1 - 2007/10/8
N2 - 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). 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.
AB - 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). 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.
UR - http://www.scopus.com/inward/record.url?scp=35148863974&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.76.044304
DO - 10.1103/PhysRevA.76.044304
M3 - Article
AN - SCOPUS:35148863974
SN - 1050-2947
VL - 76
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 044304
ER -