杂化纠缠系统的纠缠猝死研究

量子电子学报

杂化纠缠系统的纠缠猝死研究

宋玲玲，李燕*

华东师范大学物理与材料科学学院，上海 200241

出版日期:2017-09-28 发布日期:2019-06-13
通讯作者: 李燕，博士，副教授，主要研究方向：冷原子物理与量子信息。 E-mail: yli@phy.ecnu.edu.cn
作者简介:宋玲玲(1991-)，河南，研究生在读，专业：原子分子物理。Email:songlingling1991@163.com；
基金资助:
上海市自然科学基金 the Shanghai Science and Technology Committee (No. 16ZR1409800),国家自然科学基金the National Natural Science Foundation of China (No. 11104075, 11174081),中国科学院量子信息重点实验室开放课题Key Laboratory of Quantum Information, University of Science of Technology of China, Chinese Academy of Sciences (No. KQI201509).

Entanglement sudden death of decohered hybrid entangled system

SONG Lingling，LI Yan*

School of Physics and Material Science, East China Normal University, Shanghai 200241, China

Published:2017-09-28 Online:2019-06-13

摘要/Abstract

摘要： 研究了Zavatta等制备的一类杂化纠缠态在2种不同类型退相干信道下的纠缠动力学行为，以及退相干过程中出现的纠缠猝死现象。计算了相位阻尼信道和退极化信道下的纠缠度，并分析了纠缠度随时间的变化。结果表明：在相位阻尼信道下不会出现纠缠猝死现象；在退极化信道下杂化纠缠态会经历纠缠猝死，纠缠度在某一特定的时间内衰减为零。

关键词: 量子光学, 杂化纠缠, 纠缠猝死, concurrence , 退相干

Abstract: The entanglement dynamics behavior of a class of hybrid entangled state in two different quantum channels and entanglement sudden death phenomenon in the process of decoherence are investigated. The entanglement of phase damping channel and depolarization channel is calculated, and the entanglement change with time is analyzed. Results show that the entanglement sudden death phenomenon will not appear in the phase damping channel. The hybrid entangled state will undergo entanglement sudden death in the depolarization channel, and the entanglementwill decay to zero within a certain time.

Key words: quantum optics, hybrid entanglement, entanglement sudden death, concurrence, decoherence

宋玲玲，李燕*. 杂化纠缠系统的纠缠猝死研究[J]. 量子电子学报.

SONG Lingling，LI Yan*. Entanglement sudden death of decohered hybrid entangled system[J]. Chinese Journal of Quantum Electronics.

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