两个V型三能级原子系统的纠缠突然死亡与复苏

魏巧; 鄢嫣; 李高翔

doi:10.7498/aps.59.4453

摘要

研究了在真空辐射场作用下,两个V型三能级原子系统的纠缠随时间的演化特性.发现当两原子间距较远,自发辐射会导致纠缠退化,甚至导致纠缠突然死亡,而原子激发态衰变的速率会影响纠缠死亡的时间;当两原子间距非常小,由于原子间的合作效应,死亡后的纠缠会在一段时间后复苏,初始的纠缠和复苏的纠缠由不同的原因引起.

关键词:

We have studied the sudden death and revival of entanglement in two V-type three-level atoms coupled to the common vacuum. results show that in the case of largely separated atoms, spontaneous emission leads to decoherence and even causes entanglement sudden death. However, the excited-state decay rate of the atom can affect the time of entanglement sudden death. In the case of closely separated atoms, due to the collective effect of atoms, the entanglement which has been dead will revive in some time. The initial entanglement and the revival of entanglement arise from different causes.

Keywords:

作者及机构信息

(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; 武汉工程大学理学院,武汉 430073

基金项目: 国家自然科学基金(批准号:60878004)和高等学校博士学科点专项科研基金(批准号:200805110002)资助的课题.

Authors and contacts

(1)College of Physical Science and Technology , Huazhong Normal University, Wuhan 430079, China; (2)College of Physical Science and Technology , Huazhong Normal University, Wuhan 430079, China;School of Science, Wuhan Institute of Technology, Wuha 430073, China

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施引文献

[1]	McAneney H, Lee J, Kim M S 2003 Phys. Rev. A 68 063814
[2]	Hamieh S D, Katsnelson M I 2005 Phys. Rev. A 72 032316
[3]	Ikram M, Li F L, Zubairy S 2007 Phys. Rev. A 75 062336
[4]	Zhou Q C,Zhu S N 2005 Acta Phys. Sin. 54 2043 (in Chinese)[周青春、祝世宁 2005 54 2403]
[5]	Wootters W K 1998 Phys. Rev. A 80 2245
[6]	Zyczkowski K, Horodecki P, Sanpera A, Lewenstein M 1998 Phys. Rev. A 58 883
[7]	Jiang C L, Fang M F, Wu Z Z 2006 Acta Phys. Sin. 55 4647 (in Chinese)[江春蕾、方卯发、吴珍珍 2006 55 4647]
[8]	Ma X S, Wang A M 2008 Acta Phys. Sin. 57 2026 (in Chinese)[马小三、王安民 2008 57 2026]
[9]	Zhang J S, Xu J B 2009 Chin. Phys. B 18 2288
[10]	Yu T, Eberly J H 2004 Phys. Rev. Lett. 93 140404
[11]	Yu T, Eberly J H 2006 Phys. Rev. Lett. 97 140403
[12]	Ficek Z, Tanas R 2006 Phys .Rev. A 74 024304
[13]	Ficek Z, Tanas R 2008 Phys. Rev. A 77 054301
[14]	Weinstein Y S 2009 Phys. Rev. A 79 012318
[15]	Al-Amri M, Li G X, Tan R, Zubairy S 2009 Phys. Rev. A 80 022314
[16]	Song W, Chen L, Zhu S L 2009 Phys. Rev. A 80 012331
[17]	Guo L, Liang X T 2009 Acta Phys. Sin. 58 0050 (in Chinese)[郭亮、梁先庭 2009 58 0050]
[18]	Cheng Q L,Xie S Y,Yang Y P 2008 Acta Phys. Sin. 57 6968 (in Chinese)[成秋丽、谢双媛、羊亚平 2008 57 6968]
[19]	Zeng H F, Shao B, Yang L G, Li J, Zou J 2009 Chin. Phys. B 18 3265
[20]	Yu T, Eberly J H 2009 Science 323 598
[21]	Derkacz L, Jakobczyk L 2006 Phys. Rev. A 74 032313
[22]	Derkacz L, Jakobczyk L 2008 J. Phys. A 41 205304
[23]	Zhou L,Yang G H, Patnaik A K 2009 Phys. Rev. A 79 062102
[24]	Ficek Z, Swain S 2004 Phys. Rev. A 69 023401
[25]	Agarwal G S 1974 Quantum Statistical Theories of Spontaneous Emission and Their Relation to Other Approaches (Berlin: Springer) p28
[26]	Peres A 1996 Phys. Rev. Lett. 77 1413
[27]	Zyczkowski K, Horo-decki P, Sanpera A, Lewenstein M 1998 Phys. Rev. A 58 883

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