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Entanglement properties in a system of a pairwise entangled state |
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| Authors: | Liu Tang-Kun Cheng Wei-Wen Shan Chuan-Ji Gao Yun-Feng and Wang Ji-Suo |
| Affiliation: | Department of Physics, Hubei Normal University, Huangshi 435002, China Hubei Province Key Laboratory of Bioanalytical Technique (Hubei Normal University); College of Educational Technology and Massmedia, Liaocheng University, Liaocheng 252059, China; 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. |
| Keywords: | field entropy negative eigenvalues two entangled atoms two-mode entangled coherent fields |
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