Stationary entanglement between two spatially separated atoms driven by a coherent laser field
Liao Xiang-Ping(廖湘萍)a)b)c), Fang Mao-Fa(方卯发)a)†, Zheng Xiao-Juan(郑小娟)a), and Cai Jian-Wu(蔡建武)a)b)c)
a Department of Physics, Hunan Normal University, Changsha 410081, China; b Department of Physics and Electronics, Zhuzhou Teacher' College, Zhuzhou 412007, Chinac Department of Physics, Hunan Industrial University, Zhuzhou 412000, China
Abstract This paper studies quantum entanglement between two spatially separated atoms driven by a coherent laser field in the dissipative process of spontaneous emission. It is shown that the entanglement strongly depends on the detuning of the laser frequency from atomic transition frequency, the interatomic separation and the Rabi frequency of the coherent laser field. A considerable amount of steady state entanglement can be obtained near $\varDelta=-\alpha$ (i.e., the dipole--dipole interaction and the detuning cancel out mutually) for small atomic separation and large Rabi frequency of the coherent laser field.
Received: 06 September 2006
Revised: 15 October 2006
Accepted manuscript online:
PACS:
42.50.Dv
(Quantum state engineering and measurements)
Fund: Project supported by the
National Natural Science Foundation of China (Grant No
10374025), Hunan Provincial Natural Science Foundation, China
(Grant No 06JJ4003 and Grant No 06JJ2014) and by the Young
Scientific Research Foundation of Hunan Provincial Edu
Cite this article:
Liao Xiang-Ping(廖湘萍), Fang Mao-Fa(方卯发), Zheng Xiao-Juan(郑小娟), and Cai Jian-Wu(蔡建武) Stationary entanglement between two spatially separated atoms driven by a coherent laser field 2007 Chinese Physics 16 1357
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