On the Poisson approximation to photon distribution for faint lasers

被引：34

作者：

Hu, Yucheng ^{[1
]}

Peng, Xiang

Li, Tiejun

Guo, Hong

机构：

[1] Peking Univ, LMAM, Beijing 100871, Peoples R China

[2] Peking Univ, Sch Math Sci, Beijing 100871, Peoples R China

[3] Peking Univ, Sch Elect Engn & Comp Sci, Key Lab Quantum Informat & Measurements, Minist Educ, Beijing 100871, Peoples R China

来源：

PHYSICS LETTERS A | 2007年 / 367卷 / 03期

基金：

中国国家自然科学基金;

关键词：

STATISTICS;

D O I：

10.1016/j.physleta.2007.03.004

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The photon number statistics for attenuated faint laser pulses is quantitatively studied. It confirms that, even for a non-Poissonian laser source, after being attenuated into faint laser with ultra-low mean photon number, the photon number distribution would approximately be a Poisson distribution. The error of such an approximation is estimated, and numerical tests verify our theoretical analysis. This work lays a sound mathematical foundation for the well-known intuitive idea which has been widely used in quantum cryptography. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：173 / 176

页数：4

共 7 条

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[2]

Photon statistics of random lasers with resonant feedback [J].