| 压缩真空场与运动二能级原子相互作用的量子纠缠 |
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| 引用本文： | 曾明生,谢芳森,江辉明.压缩真空场与运动二能级原子相互作用的量子纠缠[J].量子电子学报,2006,23(5):647-651. |
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| 作者姓名： | 曾明生 谢芳森 江辉明 |
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| 作者单位： | 江西师范大学物理与通信电子学院,江西,南昌,330027 |
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| 基金项目： | 江西省自然科学基金资助项目（0312017） |
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| 摘 要： | 用Von Neuman熵研究了压缩真空场与运动二能级原子相互作用的量子体系的量子纠缠特性，讨论了初始压缩真空场的压缩度以及运动原子的场模结构参数对该量子体系纠缠特性的影响。结果表明，原子的运动使系统纠缠度的演化具有严格的周期性；在初始压缩度较大（r〉3）时，除了一些消纠缠点外，系统将长久停留在最大纠缠态，场模结构参数的增大将导致消纠缠次数的增多。
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| 关 键 词： | 量子光学 量子纠缠 运动二能级原子 压缩真空态 场模结构 Von Neuman熵 |
| 文章编号： | 1007-5461（2006）05-0647-05 |
| 收稿时间： | 2005-08-08 |
| 修稿时间： | 2005-10-22 |
Quantum entanglement in the interaction between squeezing vacuum state field and moving two-level atom |
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| ZENG Ming-sheng,XIE Fang-sen,JIANG Hui-ming.Quantum entanglement in the interaction between squeezing vacuum state field and moving two-level atom[J].Chinese Journal of Quantum Electronics,2006,23(5):647-651. |
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| Authors: | ZENG Ming-sheng XIE Fang-sen JIANG Hui-ming |
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| Abstract: | The properties of the entanglement between squeezing vacuum state field and moving two-level atom are investigated by using the von Neumann entropy. The influences of field-mode structure of moving two-level atom and the squeezing degree of initial squeezing vacuum state field on the entanglement of the quantum system are discussed. The results show that atomic movement can result in evolution periodically of the degree of entanglement. The quantum state will be maximally entangled state for a long time when the squeezing degree are high, the increase of field-mode structure result in more disentangled states. |
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| Keywords: | quantum optics quantum entanglement moving two-level atom squeezing vacuum state field-mode structure von Neumann entropy |
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