Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

被引：5
|
作者：
Wu Qin [1 ,2 ]
Zhang Zhi-Ming [1 ]
机构：
[1] S China Normal Univ, Lab Quantum Informat Technol, Lab Nanophoton Funct Mat & Devices SIPSE, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangdong Med Coll, Sch Informat Engn, Dongguan 523808, Peoples R China
来源：
CHINESE PHYSICS B | 2014年 / 23卷 / 03期
基金：
中国国家自然科学基金;
关键词：
entanglement sudden death; concurrence; coupled cavities; Kerr medium; QUANTUM INFORMATION; SUDDEN-DEATH; DYNAMICS; STATE;
D O I：
10.1088/1674-1056/23/3/034203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, the entanglement dynamics of two two-level atoms trapped in coupled cavities with a Kerr medium is investigated. We find that the phenomena of entanglement sudden death (ESD) and entanglement sudden birth (ESB) appear during the evolution process. The influences of initial atomic states, Kerr medium, and cavity-cavity hopping rate on the atom-atom entanglement are discussed. The results obtained by the numerical method show that the atom-atom entanglement is strengthened and even prevented from ESD with increasing cavity-cavity hopping rate and Kerr nonlinearity.
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收藏
页数：5
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