Entangled photons produced by a three-level atom in free-space

被引：8
作者：
Ma, Yong Hong [1 ]
Mu, Qing Xia [1 ]
Zhou, Ling [1 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect, Dalian 116024, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2008年 / 281卷 / 09期
基金：
中国国家自然科学基金;
关键词：
three-level atom; the quantum entropy; entanglement;
D O I：
10.1016/j.optcom.2007.12.070
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A driven three-level atom system in free-space is investigated. The quantum entropy between the three-level atom and its spontaneous field is calculated. The entanglement between them and the influence of the classical field 0 on the entanglement are studied. The result indicates that there is a steady entanglement between the three-level atom and its spontaneous field, and they cannot be disentangled even the classical field is very large. In addition, the entanglement of the k photons and q photons is studied, it shows the two field is entangled for short time evolution. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：2695 / 2699
页数：5
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