The effect of a coupling field on the entanglement dynamics of a three-level atom

被引：22
|
作者：
Mortezapour, Ali [1 ,2 ]
Abedi, Majid [2 ]
Mahmoudi, Mohammad [1 ]
Khajehpour, M. R. H. [2 ]
机构：
[1] Zanjan Univ, Dept Phys, Zanjan, Iran
[2] Inst Adv Studies Basic Sci, Zanjan, Iran
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2011年 / 44卷 / 08期
关键词：
QUANTUM-MECHANICS; CURRENT SITUATION;
D O I：
10.1088/0953-4075/44/8/085501
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The effect of a coupling laser field on the entanglement of a three-level quantum system and its spontaneous emission is investigated via the reduced quantum entropy. We consider two schemes: the upper- and lower-level couplings. By calculating the degree of entanglement (DEM) for both systems, it is shown that the entanglement between the atom and its spontaneous emission can be controlled by the coupling laser field. This field, however, affects the entanglement differently in the two schemes; it is only the lower-level coupling scheme that shows a non-zero steady state DEM which can be controlled by the intensity and detuning of the coupling laser field.
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页数：9
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