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Evolution of Entanglement for Two Atoms Interacting with a Thermal Field
Author(s): 
Pages: 379-381,397
Year: Issue:  5
Journal: Transactions of Beijing Institute of Technology

Keyword:  纠缠内禀消相干部分转置的负本征值共生纠缠度;
Abstract: 在考虑内禀消相干影响下,通过使用部分转置的负本征值(NPT)和共生纠缠度来度量原子间的纠缠.研究了两个二能级原子与初态为热态的单模光场相互作用系统中,两原子间的纠缠随时间演化问题.讨论了内禀消相干和平均光子数等对纠缠度的影响.结果表明:存在内禀消相干时随着时间的演化,原子间的纠缠逐渐减小到一个确定值.通过对两种不同的纠缠度量方法的比较,可以看出NPT和共生纠缠度的时间演化有相似的规律,能够度量同类系统的纠缠.
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