Entanglement dynamics of two distant atoms in two detuning cavities

被引：3
|
作者：
Ji Xin [1 ,2 ]
Lu Tian-Quan [1 ]
Zhang Shou [1 ,2 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China
[2] Yanbian Univ, Coll Sci, Dept Phys, Yanji 133002, Peoples R China
来源：
CHINESE PHYSICS B | 2010年 / 19卷 / 11期
基金：
中国国家自然科学基金;
关键词：
entanglement dynamics; interacting off-resonantly; Fock state; sudden death and sudden birth; TAVIS-CUMMINGS MODEL; SUDDEN-DEATH; CONCURRENCE; EVOLUTION;
D O I：
10.1088/1674-1056/19/11/110304
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the entanglement dynamics via the concurrence of two distant atoms interacting off-resonantly with two cavity fields in Fock states, respectively We find that the evolution of entanglement has sudden death and sudden birth phenomena, that with the increase of photon numbers in the two cavities, the alternate frequency of sudden death and sudden birth turns fast, and that the amplitude of concurrence oscillates regularly with oscillation frequency becoming slow when the cavity fields have the same photon numbers While, the maximum of concurrence declines and the amplitude of concurrence oscillates irregularly when the two cavity fields have different photon numbers In addition, we find the length of death time is dependent on the initial entanglement
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页数：7
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