| Fock态作用下两原子的纠缠 |
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| 引用本文： | 王修武,蔡金芳. Fock态作用下两原子的纠缠[J]. 安徽师范大学学报(自然科学版), 2005, 28(4): 411-413 |
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| 作者姓名： | 王修武 蔡金芳 |
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| 作者单位： | 北京理工大学,理学院,北京,100081;北京理工大学,理学院,北京,100081 |
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| 摘 要： | 在Milburn内禀退相干模型下,研究了单模量子辐射场Fock态作用下两个二能级原子的纠缠,得到了原子约化密度矩阵的解析形式.由于退相干,原子间纠缠将随体系的演化而衰减,最终原子态将趋于稳定,此时纠缠只依赖于场和原子的初态.纠缠度用concurrence来定量计算.
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| 关 键 词： | 量子信息 纠缠 退相干 |
| 文章编号： | 1001-2443（2005）04-0411-03 |
| 收稿时间： | 2005-08-01 |
| 修稿时间： | 2005-08-01 |
QUANTUM ENTANGLEMENT OF TWO ATOMS INDUCED BY A FOCK STATE |
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| WANG Xiu-wu,CAI Jin-fang. QUANTUM ENTANGLEMENT OF TWO ATOMS INDUCED BY A FOCK STATE[J]. Journal of Anhui Normal University(Natural Science Edition), 2005, 28(4): 411-413 |
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| Authors: | WANG Xiu-wu CAI Jin-fang |
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| Affiliation: | School of Science, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | In the consideration of Milburn model of intrinsic decoherence, we investigate the entanglement between two two-level atoms interacting with a Fock state of single-mode quantized radiation field. The reduced density matrix of the atom system is given explicitly. Due to the intrinsic decoherence, the entanglement of the atoms will decrease as the evolution of the system. And finally, the atoms system will approach a stationary state which the stationary entanglement depends on the initial states of the field and the atoms. Here, the entanglement is calculated by making use of the concurrence. |
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| Keywords: | quantum information entanglement decoherence |
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