Quantum cryptography

被引:113
作者
Zbinden, H [1 ]
Bechmann-Pasquinucci, H [1 ]
Gisin, N [1 ]
Ribordy, G [1 ]
机构
[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland
来源
APPLIED PHYSICS B-LASERS AND OPTICS | 1998年 / 67卷 / 06期
关键词
D O I
10.1007/s003400050574
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
After a short introduction to classic cryptography we explain thoroughly how quantum cryptography works. We present then an elegant experimental realization based on a self-balanced interferometer with Faraday mirrors. This phase-coding setup needs no alignment of the interferometer nor polarization control, and therefore considerably facilitates the experiment. Moreover it features excellent fringe visibility. Next, we estimate the practical limits of quantum cryptography. The importance of the detector noise is illustrated and means of reducing it are presented. With present-day technologies maximum distances of about 70 km with bit rates of 100 Hz are achievable.
引用
收藏
页码:743 / 748
页数:6
相关论文
共 15 条
[1]  
[Anonymous], P SPIE
[2]  
BECHMANNPASQUIN.H, 1998, INTERNAL REPORT U GE
[3]  
Bennett C. H., 1992, Journal of Cryptology, V5, P3, DOI 10.1007/BF00191318
[4]  
Bennett C. H., 1984, PROC IEEE INT C COMP, P175, DOI [DOI 10.1016/J.TCS.2014.05.025, 10.1016/j.tcs.2014.05.025]
[5]   QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].
BENNETT, CH .
PHYSICAL REVIEW LETTERS, 1992, 68 (21) :3121-3124
[6]   OPERATIONAL SYSTEM FOR QUANTUM CRYPTOGRAPHY [J].
FRANSON, JD ;
JACOBS, BC .
ELECTRONICS LETTERS, 1995, 31 (03) :232-234
[7]  
FUCHS CA, 1997, PHYS REV A, V56, P1063
[8]  
HUGHES RJ, 1996, LECT NOTES COMPUT SC, V1109, P329
[9]   QUANTUM CRYPTOGRAPHY WITH COHERENT STATES [J].
HUTTNER, B ;
IMOTO, N ;
GISIN, N ;
MOR, T .
PHYSICAL REVIEW A, 1995, 51 (03) :1863-1869
[10]   QUANTUM KEY DISTRIBUTION OVER DISTANCES AS LONG AS 30 KM [J].
MARAND, C ;
TOWNSEND, PD .
OPTICS LETTERS, 1995, 20 (16) :1695-1697