Characterization of photon statistics in a single-photon source via variable attenuation

被引：1
|
作者：
Zhang, ShengLi [1 ,2 ]
Zou, Xubo [1 ]
Li, ChuanFeng [1 ]
Jin, ChenHui [2 ]
Guo, GuangCan [1 ]
机构：
[1] Univ Sci & Technol China CAS, Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Informat Engn Univ, Elect Technol Inst, Zhengzhou 450004, Henan, Peoples R China
来源：
PHYSICAL REVIEW A | 2009年 / 80卷 / 04期
基金：
中国国家自然科学基金;
关键词：
quantum cryptography; quantum optics; QUANTUM KEY DISTRIBUTION; NUMBER STATISTICS; EMISSION; SECURITY; STATES; DOT;
D O I：
10.1103/PhysRevA.80.043807
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a simple but effective scheme for characterizing photon-number statistics of a practical single-photon source. In this scheme, the variable attenuation method which frequently appears in decoy state quantum cryptography is utilized here to enhance the estimation of photon-number statistics. A much stricter bound for vacuum and single-photon proportions is obtained and this result, in turn, is shown to be applicable to the unconditional secure quantum cryptographic communication with single-photon devices.
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页数：5
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