Entanglement properties in a system of a pairwise entangled state
Liu Tang-Kun(刘堂昆)a)†, Cheng Wei-Wen(程维文)a), Shan Chuan-Jia(单传家) a), Gao Yun-Feng(高云峰)b), and Wang Ji-Suo(王继锁)c)
a Department of Physics, Hubei Normal University, Huangshi 435002, China Hubei Province Key Laboratory of Bioanalytical Technique (Hubei Normal University); b College of Educational Technology and Massmedia, Liaocheng University, Liaocheng 252059, China; c Institute of Optical Communication, Liaocheng University, Liaocheng 252059, China
Abstract Based on the quantum information theory, this paper has investigated the entanglement properties of a system which is composed of the two entangled two-level atoms interacting with the two-mode entangled coherent fields. The influences of the strength of light field and the two parameters of entanglement between the two-mode fields on the field entropy and on the negative eigenvalues of partial transposition of density matrix are discussed by using numerical calculations. The result shows that the entanglement properties in a system of a pairwise entangled states can be controlled by appropriately choosing the two parameters of entanglement between the two-mode entangled coherent fields and the strength of two light fields respectively.
Fund: Project supported by the Higher
Education of Hubei Province of China (Grant No Z200522001) and the
Natural Science Foundation of Hubei Province of China (Grant No
2006ABA055).
Cite this article:
Liu Tang-Kun(刘堂昆), Cheng Wei-Wen(程维文), Shan Chuan-Jia(单传家) , Gao Yun-Feng(高云峰), and Wang Ji-Suo(王继锁) Entanglement properties in a system of a pairwise entangled state 2007 Chinese Physics 16 3697
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