不同环境模型下Bell型纠缠态衰退行为的比较

韩伟; 崔文凯; 张英杰; 夏云杰

doi:10.7498/aps.61.230302

摘要

通过建立三种不同的环境模型(单一热库模型, 共同热库模型和独立热库模型), 利用赝模理论的方法, 分析讨论了初始处于Bell型纠缠态系统的纠缠演化特性. 研究发现在单一热库模型中Bell型初始纠缠态cos θ |ee> + sin θ |gg> 的纠缠保持时间最长, 而cos θ |eg> + sin θ |ge> 态的纠缠演化对具体的环境模型依赖很大;同时对这两种不同类型的Bell型纠缠态在相同环境模型中的纠缠衰退行为进行了比较.

关键词:

Abstract

Establishing three different environment models (i.e., single reservoir model, common reservoir model and independent reservoir model), we investigate the evolutional characteristic of the entangled system initially in Bell-like state by the pseudomode method. Through comparing the entanglement decays under the three different environment models, we find that the entangled Bell-like state cos θ |ee> + sin θ |gg> will be kept in the single reservoir model for a time longer than in the other two models. However, the entanglement decay behavior of Bell-like state cos θ |eg> + sin θ |ge> is dependent on the specific environment model. Meanwhile, the comparison of entanglement decay between the above two Bell-like states at the same environment models is performed.

Keywords:

作者及机构信息

1.
曲阜师范大学物理工程学院, 曲阜 273165;

2.
山东省激光偏光与信息技术重点实验室, 曲阜师范大学物理系, 曲阜 273165

基金项目: 国家自然科学基金(批准号: 61178012, 10947006)和曲阜师范大学校青年基金项目(批准号: XJ201013)资助的课题.

Authors and contacts

1.
Department of Physics, Qufu Normal University, Qufu 273165, China;

2.
Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China

Funds: Project supported by the Key Program of National Science Foundation of China (Grant No.10534030), and the Young Teacher Research Funds from Qufu Normal University, China (Grant No. XJ201013).

参考文献

[1]	Ai Q, Wang Y D, Long G L, Sun C P 2009 Sci. China-Phys. Mech. Astron. 52 1898
[2]	Xu G F, Kwek L C, Tong D M 2012 Sci. China-Phys. Mech. Astron. 55 808
[3]	Ma X S, Ren M F, Zhao G X 2011 Sci. China-Phys. Mech. Astron. 54 1833
[4]	Qian Y, Zhang Y Q, Xu J B 2012 Chin. Sci. Bull. 57 1637
[5]	Wu R B, Zhang J, Li C W, Long G L, Tarn T J 2012 Chin. Sci. Bull. 57 2194
[6]	Yu T, Eberly J H 2004 Phys. Rev. Lett. 93 140404
[7]	Yu T, Eberly J H 2009 Science 323 598
[8]	Zhang Y J, Man Z X, Xia Y J, Guo G C 2010 Eur. Phys. J. D 58 397
[9]	Bellomo B, Franco R L, Maniscalco S, Compagno G 2008 Phys. Rev. A 78 060302
[10]	Han F, Zhang M H 2011 Inter. Quantum Information 9 1533
[11]	Yu T, Eberly J H 2007 Quantum Inf. Comp. 7 459
[12]	Wootters W K 1998 Phys. Rev. Lett. 80 2245
[13]	Li Y, Guo H 2009 e-print arXiv:quant-ph/09090375
[14]	Zhang Y J, Man Z X, Xia Y J 2009 Eur. Phys. J. D 55 173
[15]	Garraway B M 1997 Phys. Rev. A 55 4636
[16]	Lopez C E, Romero G, Lastra F, Solano E, Retamal J C 2008 Phys. Rev. Lett. 101 080503

施引文献

[1]	Ai Q, Wang Y D, Long G L, Sun C P 2009 Sci. China-Phys. Mech. Astron. 52 1898
[2]	Xu G F, Kwek L C, Tong D M 2012 Sci. China-Phys. Mech. Astron. 55 808
[3]	Ma X S, Ren M F, Zhao G X 2011 Sci. China-Phys. Mech. Astron. 54 1833
[4]	Qian Y, Zhang Y Q, Xu J B 2012 Chin. Sci. Bull. 57 1637
[5]	Wu R B, Zhang J, Li C W, Long G L, Tarn T J 2012 Chin. Sci. Bull. 57 2194
[6]	Yu T, Eberly J H 2004 Phys. Rev. Lett. 93 140404
[7]	Yu T, Eberly J H 2009 Science 323 598
[8]	Zhang Y J, Man Z X, Xia Y J, Guo G C 2010 Eur. Phys. J. D 58 397
[9]	Bellomo B, Franco R L, Maniscalco S, Compagno G 2008 Phys. Rev. A 78 060302
[10]	Han F, Zhang M H 2011 Inter. Quantum Information 9 1533
[11]	Yu T, Eberly J H 2007 Quantum Inf. Comp. 7 459
[12]	Wootters W K 1998 Phys. Rev. Lett. 80 2245
[13]	Li Y, Guo H 2009 e-print arXiv:quant-ph/09090375
[14]	Zhang Y J, Man Z X, Xia Y J 2009 Eur. Phys. J. D 55 173
[15]	Garraway B M 1997 Phys. Rev. A 55 4636
[16]	Lopez C E, Romero G, Lastra F, Solano E, Retamal J C 2008 Phys. Rev. Lett. 101 080503

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