The entanglement of two dipole--dipole coupled atoms interacting with a thermal field via a two-photon process
Liao Xiang-Ping(廖湘萍)a)b)c), Fang Mao-Fa(方卯发)a)†, Cai Jian-Wu(蔡建武)a)b)c), and Zheng Xiao-Juan(郑小娟)a)
a Department of Physics, Hunan Normal University, Changsha 410081, China; b Department of Physics and Electronics, Zhuzhou Teacher' College, ZhuZhou 412007, China; cDepartment of Physics, Hunan Industrial University, Zhuzhou 412000, China
Abstract This paper studies entanglement between two dipole--dipole coupled atoms interacting with a thermal field via a two-photon process. It shows that the entanglement is dependent on the mean photon number of the thermal field and the dipole--dipole interaction. The results also show that the atom--atom entanglement through the two-photon process is larger than that through the one-photon process and a remarkable amount of entanglement between the atoms still remains at certain times even for a very highly noisy thermal field.
Received: 15 July 2007
Revised: 30 December 2007
Accepted manuscript online:
Fund: Project supported by
the National Natural Science Foundation of China (Grant No
10374025), Hunan Provincial Natural Science Foundation (Grant Nos
06JJ4003 and 06JJ2014) and the Young Scientific Research Foundation
of Hunan Provincial Education Department
Cite this article:
Liao Xiang-Ping(廖湘萍), Fang Mao-Fa(方卯发), Cai Jian-Wu(蔡建武), and Zheng Xiao-Juan(郑小娟) The entanglement of two dipole--dipole coupled atoms interacting with a thermal field via a two-photon process 2008 Chin. Phys. B 17 2137
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