| 原子间纠缠和光场模间纠缠的对应关系 |
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| 引用本文： | 熊恒娜,郭红,江健,陈俊,唐丽艳.原子间纠缠和光场模间纠缠的对应关系[J].物理学报,2006,55(6):2720-2725. |
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| 作者姓名： | 熊恒娜 郭红 江健 陈俊 唐丽艳 |
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| 作者单位： | (1)华中师范大学物理科学与技术学院,武汉 430079; (2)华中师范大学物理科学与技术学院,武汉 430079;中国科学院武汉物理与数学研究所,波谱与原子分子物理国家重点实验室,武汉 430071;中国科学院冷原子物理中心,武汉 430071 |
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| 摘 要： | 本文应用negativity和concurrence两种纠缠度量标准，考察了双原子与双模光场相互作用系统中，原子间纠缠和光场模间纠缠随时间的演化规律，发现它们在时间演化过程中可以相互转换，在一定条件下两者具有很好的对应关系；对于两量子位系统，negativity和concurrence的取值范围一样，在判断纠缠存在与否的标准上也完全相同，但当系统处于混态时二者的大小不能始终保持一致.
关键词：
量子纠缠
negetivity
concurrence
双原子
双模光场
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| 关 键 词： | 量子纠缠 negetivity concurrence 双原子 双模光场 |
| 文章编号： | 1000-3290/2006/55（06）/2720-06 |
| 收稿时间： | 6/6/2005 12:00:00 AM |
| 修稿时间： | 2005-06-062005-11-12 |
The relation between the entanglement of two atoms and the entanglement of two-mode fields |
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| Xiong Heng-Na,Guo Hong,Jiang Jian,Chen Jun,Tang Li-Yan.The relation between the entanglement of two atoms and the entanglement of two-mode fields[J].Acta Physica Sinica,2006,55(6):2720-2725. |
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| Authors: | Xiong Heng-Na Guo Hong Jiang Jian Chen Jun Tang Li-Yan |
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| Institution: | 1.College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China; 2.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China ; 3. Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | By means of negativity and concurrence, we investigate the time evolution of the entanglement of the two atoms and the entanglement between the two modes in the system of two atoms interacting with two-mode fields. We find the two entanglements can swap with each other, and they have a very good coincidence relation under certain conditions. In two -qubit system, negativity and concurrence in the same range can keep identical with each other on the standard of the existence of entanglement, but they may not always keep pace with each other for mixed states of the system. |
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| Keywords: | negetivity concurrence |
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