| 双光子连续频率变量纠缠熵 |
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| 引用本文： | 翟艳花,曹德忠,汪凯戈. 双光子连续频率变量纠缠熵[J]. 量子光学学报, 2004, 10(4): 139-142 |
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| 作者姓名： | 翟艳花 曹德忠 汪凯戈 |
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| 作者单位： | 北京师范大学,物理系,应用光学北京市重点实验室,北京,100875;北京师范大学,物理系,应用光学北京市重点实验室,北京,100875;北京师范大学,物理系,应用光学北京市重点实验室,北京,100875 |
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| 基金项目： | 国家重点基础研究发展规划(973)子课题:"量子信息基础理论"(编号2001CB309310),国家自然科学基金(No.60278021) |
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| 摘 要： | 介绍了连续频率变量系统中纠缠熵的计算方法。根据这种方法我们计算了自发参量下转换产生的具有高斯型频谱形式的双光子态的纠缠熵,证实了纠缠熵的大小和泵浦光带宽(σp)与下转换光带宽(σ)之比有关的直观分析.
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| 关 键 词： | 纠缠熵 双光子纠缠态 自发参量下转换 |
| 文章编号： | 1007-6654(2004)04-0139-04 |
| 收稿时间： | 2004-07-26 |
| 修稿时间： | 2004-07-26 |
Entangled Entropy of a Two-photon System with Continuous Frequency Systems |
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| ZHAI Yanhua,CAO Dezhong,WANG Kaige. Entangled Entropy of a Two-photon System with Continuous Frequency Systems[J]. Acta Sinica Quantum Optica, 2004, 10(4): 139-142 |
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| Authors: | ZHAI Yanhua CAO Dezhong WANG Kaige |
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| Abstract: | The way to quantify entanglement for a continuous variable bipartite state is discussed. The entangled entropy for a two-photon state with Gaussian continuous spectrum is calculated. The numerical simulation shows that the entanglement entropy is related to the ration of two-photon entangled state bandwidths between the pump and the down-coverted beam, and the result is consistent with the physics reality. |
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| Keywords: | entangled entropy two-photon entangled state spontaneously parametric down-conversion(SPDC) |
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